Here are some rhymes for "monkeys":
Perfect rhymes:
* donkeys
* flunkies
* junkies
* punks
* spunkies
* tonkeys (a made-up word, but fun!)
Near rhymes:
* bonkers
* clunkers
* honkies (offensive term, avoid)
* hunks
* stunk
* wonky
Eye rhymes:
* money
* honey
* sunny
Let me know if you'd like more examples, or rhymes that fit a specific context!