Perfect rhymes:
* boo-hoo
* cu (slang for "cool")
* do (as in "to do")
* few
* hoo (as in "hoo boy!")
* loo (British slang for "toilet")
* roo (as in "kangaroo")
* shoo
* too
* who
Near rhymes:
* cure
* pure
* sure
Eye rhymes:
* Jew (not recommended for casual use, as it can be considered offensive)
Remember, the best rhyme depends on the context of your writing.