Perfect Rhymes:
* Booban (slang for "boob")
* Cooban (rare word, possibly a regional variant of "cuban")
* Duban (a type of tobacco)
* Luban (a type of incense)
Near Rhymes:
* Auburn (a reddish-brown color)
* Spleen (an organ)
* Queen (a female monarch)
* Seen (past participle of "see")
Eye Rhymes:
* Human
* Sudan
The best rhyming word will depend on the context of your writing.