Perfect Rhymes (same vowel sound and ending consonant sound):
* None - There aren't any common words that rhyme perfectly with "wean".
Near Rhymes (similar vowel sound and ending consonant sound):
* lean
* mean
* seen
Eye Rhymes (words that look like they rhyme but don't sound the same):
* dean
* clean
* keen
Other Options:
* ween (archaic word for "think")
Ultimately, the best rhyming word will depend on the context of your poem or sentence.