diff --git a/README.md b/README.md
index 466b348..1dfe5ef 100644
--- a/README.md
+++ b/README.md
@@ -69,11 +69,11 @@ There are five simple ways to create coroutines:
     this is a shortcut to `coroutine_create(callable, *args, CO_STACK_SIZE)`.
 2. `co_await(callable, *args);` returns your _value_ inside a generic union **value_t** type, after coroutine fully completes.
     - This is a combine shortcut to four functions:
-    1. `co_wait_group();` returns **hash-table** storing _coroutine-id's_ of any future created,
+    1. `work_group();` returns **hash-table** storing _coroutine-id's_ of any future created,
     2. `co_go(callable, *args);` calls, will end with a call to,
     3. `co_wait(hash-table);` will suspend current coroutine, process coroutines until all are completed,
         returns **hash-table** of results for,
-    4. `co_group_get_result(hash-table, coroutine-id);` returns your _value_ inside a generic union **value_t** type.
+    4. `work_group_result(hash-table, coroutine-id);` returns your _value_ inside a generic union **value_t** type.
 3. `co_execute(function, *args)` creates coroutine and immediately execute, does not return any value.
 4. `co_event(callable, *args)` same as `co_await()` but for **libuv** or any event driven like library.
 5. `co_handler(function, *handle, destructor)` initial setup for coroutine background handling of **http** _request/response_,
@@ -110,14 +110,14 @@ a terminated/finish status.
 
 The initialization ends when `co_wait()` is called, as such current coroutine will pause, and
 execution will begin for the group of coroutines, and wait for all to finished. */
-C_API wait_group_t *co_wait_group(void);
+C_API wait_group_t *work_group(void);
 
 /* Pauses current coroutine, and begin execution for given coroutine wait group object, will
 wait for all to finished. Returns hast table of results, accessible by coroutine id. */
 C_API wait_result_t co_wait(wait_group_t *);
 
 /* Returns results of the given completed coroutine id, value in union value_t storage format. */
-C_API value_t co_group_get_result(wait_result_t *, int);
+C_API value_t work_group_result(wait_result_t *, int);
 
 /* Creates an unbuffered channel, similar to golang channels. */
 C_API channel_t *channel(void);
@@ -163,7 +163,7 @@ C_API void co_execute(co_call_t, void_t);
 
 /* Explicitly give up the CPU for at least ms milliseconds.
 Other tasks continue to run during this time. */
-C_API unsigned int co_sleep(unsigned int ms);
+C_API unsigned int sleep_for(unsigned int ms);
 
 /* Call `CO_MALLOC` to allocate memory of given size in current coroutine,
 will auto free `LIFO` on function exit/return, do not free! */
@@ -278,7 +278,7 @@ void_t greetings(void_t arg)
     for (int i = 0; i < 3; i++)
     {
         printf("%d ==> %s\n", i, name);
-        co_sleep(1);
+        sleep_for(1);
     }
     return 0;
 }
@@ -288,7 +288,7 @@ int co_main(int argc, char **argv)
     puts("Start of main Goroutine");
     co_go(greetings, "John");
     co_go(greetings, "Mary");
-    co_sleep(1000);
+    sleep_for(1000);
     puts("End of main Goroutine");
     return 0;
 }
@@ -606,7 +606,7 @@ void_t worker(void_t arg)
     int id = co_id();
     printf("Worker %d starting\n", id);
 
-    co_sleep(1000);
+    sleep_for(1000);
     printf("Worker %d done\n", id);
     if (id == 4)
         return (void_t)32;
@@ -619,7 +619,7 @@ void_t worker(void_t arg)
 int co_main(int argc, char **argv)
 {
     int cid[5];
-    wait_group_t *wg = co_wait_group();
+    wait_group_t *wg = work_group();
     for (int i = 1; i <= 5; i++)
     {
        cid[i-1] = co_go(worker, &i);
@@ -628,10 +628,10 @@ int co_main(int argc, char **argv)
 
     printf("\nWorker # %d returned: %d\n",
            cid[2],
-           co_group_get_result(wgr, cid[2]).integer);
+           work_group_result(wgr, cid[2]).integer);
     printf("\nWorker # %d returned: %s\n",
            cid[1],
-           co_group_get_result(wgr, cid[1]).string);
+           work_group_result(wgr, cid[1]).string);
     return 0;
 }
 ```
diff --git a/docs/index.md b/docs/index.md
index 53eded6..cdd5679 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -69,11 +69,11 @@ There are five simple ways to create coroutines:
     this is a shortcut to `coroutine_create(callable, *args, CO_STACK_SIZE)`.
 2. `co_await(callable, *args);` returns your _value_ inside a generic union **value_t** type, after coroutine fully completes.
     - This is a combine shortcut to four functions:
-    1. `co_wait_group();` returns **hash-table** storing _coroutine-id's_ of any future created,
+    1. `work_group();` returns **hash-table** storing _coroutine-id's_ of any future created,
     2. `co_go(callable, *args);` calls, will end with a call to,
     3. `co_wait(hash-table);` will suspend current coroutine, process coroutines until all are completed,
         returns **hash-table** of results for,
-    4. `co_group_get_result(hash-table, coroutine-id);` returns your _value_ inside a generic union **value_t** type.
+    4. `work_group_result(hash-table, coroutine-id);` returns your _value_ inside a generic union **value_t** type.
 3. `co_execute(function, *args)` creates coroutine and immediately execute, does not return any value.
 4. `co_event(callable, *args)` same as `co_await()` but for **libuv** or any event driven like library.
 5. `co_handler(function, *handle, destructor)` initial setup for coroutine background handling of **http** _request/response_,
@@ -110,14 +110,14 @@ a terminated/finish status.
 
 The initialization ends when `co_wait()` is called, as such current coroutine will pause, and
 execution will begin for the group of coroutines, and wait for all to finished. */
-C_API wait_group_t *co_wait_group(void);
+C_API wait_group_t *work_group(void);
 
 /* Pauses current coroutine, and begin execution for given coroutine wait group object, will
 wait for all to finished. Returns hast table of results, accessible by coroutine id. */
 C_API wait_result_t co_wait(wait_group_t *);
 
 /* Returns results of the given completed coroutine id, value in union value_t storage format. */
-C_API value_t co_group_get_result(wait_result_t *, int);
+C_API value_t work_group_result(wait_result_t *, int);
 
 /* Creates an unbuffered channel, similar to golang channels. */
 C_API channel_t *channel(void);
@@ -163,7 +163,7 @@ C_API void co_execute(co_call_t, void_t);
 
 /* Explicitly give up the CPU for at least ms milliseconds.
 Other tasks continue to run during this time. */
-C_API unsigned int co_sleep(unsigned int ms);
+C_API unsigned int sleep_for(unsigned int ms);
 
 /* Call `CO_MALLOC` to allocate memory of given size in current coroutine,
 will auto free `LIFO` on function exit/return, do not free! */
@@ -275,7 +275,7 @@ void_t greetings(void_t arg)
     for (int i = 0; i < 3; i++)
     {
         printf("%d ==> %s\n", i, name);
-        co_sleep(1);
+        sleep_for(1);
     }
     return 0;
 }
@@ -285,7 +285,7 @@ int co_main(int argc, char **argv)
     puts("Start of main Goroutine");
     co_go(greetings, "John");
     co_go(greetings, "Mary");
-    co_sleep(1000);
+    sleep_for(1000);
     puts("End of main Goroutine");
     return 0;
 }
@@ -621,7 +621,7 @@ void_t worker(void_t arg) {
     int id = co_id();
     printf("Worker %d starting\n", id);
 
-    co_sleep(1000);
+    sleep_for(1000);
     printf("Worker %d done\n", id);
     if (id == 4)
         return (void_t)32;
@@ -634,7 +634,7 @@ void_t worker(void_t arg) {
 int co_main(int argc, char **argv)
 {
     int cid[5];
-    wait_group_t *wg = co_wait_group();
+    wait_group_t *wg = work_group();
     for (int i = 1; i <= 5; i++) {
        cid[i-1] = co_go(worker, &i);
     }
@@ -642,10 +642,10 @@ int co_main(int argc, char **argv)
 
     printf("\nWorker # %d returned: %d\n",
            cid[2],
-           co_group_get_result(wgr, cid[2]).integer);
+           work_group_result(wgr, cid[2]).integer);
     printf("\nWorker # %d returned: %s\n",
            cid[1],
-           co_group_get_result(wgr, cid[1]).string);
+           work_group_result(wgr, cid[1]).string);
     return 0;
 }
 </code></pre>
diff --git a/examples/benchmark.c b/examples/benchmark.c
index 232e38c..3d88ab6 100644
--- a/examples/benchmark.c
+++ b/examples/benchmark.c
@@ -37,7 +37,7 @@ func main() {
 #include "coroutine.h"
 
 void *func(void *arg) {
-    co_sleep(10 * time_Second);
+    sleep_for(10 * time_Second);
     return 0;
 }
 
@@ -46,8 +46,8 @@ int co_main(int argc, char **argv) {
     if (argc > 1)
         numRoutines = (u32)atoi(argv[1]);
 
-    co_wait_group_capacity(Kb(25));
-    wait_group_t *wg = co_wait_group();
+    work_group_capacity(Kb(25));
+    wait_group_t *wg = work_group();
     for (i = 0; i < numRoutines; i++) {
         co_go(func, NULL);
     }
diff --git a/examples/go_multi_args.c b/examples/go_multi_args.c
index 3193481..212005e 100644
--- a/examples/go_multi_args.c
+++ b/examples/go_multi_args.c
@@ -7,7 +7,7 @@ void *worker(void *arg) {
 
     for (int i = 0; i < count; i++) {
         printf("%s\n", text);
-        co_sleep(10);
+        sleep_for(10);
     }
     return 0;
 }
@@ -17,7 +17,7 @@ int co_main(int argc, char **argv) {
     co_go(worker, args_for("is", 2, "b"));
     co_go(worker, args_for("is", 3, "c"));
 
-    co_sleep(100);
+    sleep_for(100);
 
     return 0;
 }
diff --git a/examples/go_sleep.c b/examples/go_sleep.c
index 5a889eb..a19669e 100644
--- a/examples/go_sleep.c
+++ b/examples/go_sleep.c
@@ -5,7 +5,7 @@ void *greetings(void *arg) {
     const char *name = c_const_char(arg);
     for (int i = 0; i < 3; i++) {
         printf("%d ==> %s\n", i, name);
-        co_sleep(1);
+        sleep_for(1);
     }
     return 0;
 }
@@ -14,7 +14,7 @@ int co_main(int argc, char **argv) {
     puts("Start of main Goroutine");
     co_go(greetings, "John");
     co_go(greetings, "Mary");
-    co_sleep(1000);
+    sleep_for(1000);
     puts("\nEnd of main Goroutine");
     return 0;
 }
diff --git a/examples/go_wait_group.c b/examples/go_wait_group.c
index 05e1c42..9c75b59 100644
--- a/examples/go_wait_group.c
+++ b/examples/go_wait_group.c
@@ -7,7 +7,7 @@ void *worker(void *arg) {
     printf("Worker %d starting\n", wid);
     co_info_active();
 
-    co_sleep(1000);
+    sleep_for(1000);
 
     printf("Worker %d done\n", wid);
     co_info_active();
@@ -22,13 +22,13 @@ void *worker(void *arg) {
 
 int co_main(int argc, char **argv) {
     int cid[5], i;
-    wait_group_t *wg = co_wait_group();
+    wait_group_t *wg = work_group();
     for (i = 1; i <= 5; i++) {
         cid[i - 1] = co_go(worker, args_for("i", i));
     }
     wait_result_t *wgr = co_wait(wg);
 
-    printf("\nWorker # %d returned: %d\n", cid[2], co_group_get_result(wgr, cid[2]).integer);
-    printf("\nWorker # %d returned: %s\n", cid[1], co_group_get_result(wgr, cid[1]).char_ptr);
+    printf("\nWorker # %d returned: %d\n", cid[2], work_group_result(wgr, cid[2]).integer);
+    printf("\nWorker # %d returned: %s\n", cid[1], work_group_result(wgr, cid[1]).char_ptr);
     return 0;
 }
diff --git a/examples/test_delay.c b/examples/test_delay.c
index d3a0f44..fae3786 100644
--- a/examples/test_delay.c
+++ b/examples/test_delay.c
@@ -4,7 +4,7 @@ channel_t *c;
 
 void *delay_co(void *arg) {
     int v = atoi(c_char_ptr(arg));
-    co_sleep(v);
+    sleep_for(v);
     printf("awake after %d ms\n", v);
     co_send(c, 0);
 
diff --git a/include/coroutine.h b/include/coroutine.h
index dfd6b92..f6d6bd4 100644
--- a/include/coroutine.h
+++ b/include/coroutine.h
@@ -772,7 +772,7 @@ C_API void co_process(func_t fn, void_t args);
 
 /* Explicitly give up the CPU for at least ms milliseconds.
 Other tasks continue to run during this time. */
-C_API u32 co_sleep(u32 ms);
+C_API u32 sleep_for(u32 ms);
 
 /* Print coroutine internal data state, only active in `debug` builds. */
 C_API void co_info(routine_t *t);
@@ -908,17 +908,17 @@ C_API ht_string_t *ht_string_init(void);
 All coroutines here behaves like regular functions, meaning they return values, and indicate a terminated/finish status.
 
 The initialization ends when `co_wait()` is called, as such current coroutine will pause, and execution will begin for the group of coroutines, and wait for all to finished. */
-C_API wait_group_t *co_wait_group(void);
+C_API wait_group_t *work_group(void);
 
 /* Set global wait group `hash table` initial capacity. */
-C_API void co_wait_group_capacity(u32);
+C_API void work_group_capacity(u32);
 
 /* Pauses current coroutine, and begin execution for given coroutine wait group object, will wait for all to finish.
 Returns hast table of results, accessible by coroutine id. */
 C_API wait_result_t *co_wait(wait_group_t *);
 
 /* Returns results of the given completed coroutine id, value in union value_t storage format. */
-C_API value_t co_group_get_result(wait_result_t *, u32);
+C_API value_t work_group_result(wait_result_t *, u32);
 
 C_API void co_result_set(routine_t *, void_t);
 C_API void co_plain_set(routine_t *, size_t);
diff --git a/src/coroutine.c b/src/coroutine.c
index 8056613..11fe16e 100644
--- a/src/coroutine.c
+++ b/src/coroutine.c
@@ -128,13 +128,13 @@ CO_FORCE_INLINE bool co_terminated(routine_t *co) {
 }
 
 value_t co_await(callable_t fn, void_t arg) {
-    wait_group_t *wg = co_wait_group();
+    wait_group_t *wg = work_group();
     u32 cid = co_go(fn, arg);
     wait_result_t *wgr = co_wait(wg);
     if (is_empty(wgr))
         return;
 
-    return co_group_get_result(wgr, cid);
+    return work_group_result(wgr, cid);
 }
 
 value_t co_event(callable_t fn, void_t arg) {
@@ -185,11 +185,11 @@ void co_process(func_t fn, void_t args) {
     hash_free(eg);
 }
 
-CO_FORCE_INLINE void co_wait_group_capacity(u32 size) {
+CO_FORCE_INLINE void work_group_capacity(u32 size) {
     hash_capacity(size + (size * 0.333334));
 }
 
-wait_group_t *co_wait_group(void) {
+wait_group_t *work_group(void) {
     routine_t *c = co_active();
     wait_group_t *wg = ht_group_init();
     c->wait_active = true;
@@ -259,7 +259,7 @@ wait_result_t *co_wait(wait_group_t *wg) {
     return has_erred ? NULL : wgr;
 }
 
-value_t co_group_get_result(wait_result_t *wgr, u32 cid) {
+value_t work_group_result(wait_result_t *wgr, u32 cid) {
     if (is_empty(wgr))
         return;
 
diff --git a/src/scheduler.c b/src/scheduler.c
index 55b93de..97a45a9 100644
--- a/src/scheduler.c
+++ b/src/scheduler.c
@@ -1355,7 +1355,7 @@ static void_t coroutine_wait(void_t v) {
     }
 }
 
-u32 co_sleep(u32 ms) {
+u32 sleep_for(u32 ms) {
     size_t when, now;
     routine_t *t;