Here are some examples:
Animal Sounds:
* Meow (cat)
* Woof (dog)
* Moo (cow)
* Baa (sheep)
* Quack (duck)
* Cluck (chicken)
* Oink (pig)
* Roar (lion)
* Chirp (bird)
Actions and Sounds:
* Bang
* Crash
* Sizzle
* Pop
* Hiss
* Buzz
* Tick-tock
* Drip
* Thump
* Zip
* Zoom
Other Examples:
* Squelch (walking through mud)
* Gulp (drinking)
* Slurp (drinking)
* Splash (water)
* Whirr (machine)
* Click (mouse)
This is just a small selection; there are many more onomatopoeic words in English and other languages.
Let me know if you'd like to explore more specific examples or have any other questions!