I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
clauses classes calluses coleuses closes callouses glasses classis calloses glassies cullises galluses colessees coulisses colzas glaces calces glazes clozes galleasses galliasses glasshouse glosses culices calyces calices calesas colossus glossies coalesces gallowses glacis glozes glossas
clauses lases palliasses molasses glasses galliasses classes coleuses jealousies callouses jalousies ileuses valses phalluses soleuses pulses dulses pluses bolases lasses calluses plusses pleases paillasses malaises galluses boluses galleasses blouses leases liaises louses aliases balases delouses releases taluses
clause cauls class classy claws clays clues colas