Near Rhymes (words that have similar vowel sounds):
* closer
* coarser
* fosser (an archaic word for a person who digs ditches)
Eye Rhymes (words that are spelled similarly but don't sound alike):
* crosse (a type of stick used in lacrosse)
* rosser (a less common spelling of "ross")
Slant Rhymes (words with similar consonant sounds, but different vowel sounds):
* censor
* coffer
* drosser (a less common word for someone who removes dross)
If you tell me what you're writing about, I can help you find the best rhyming word for your context!