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.
colzas clozes classes calesas classis clauses coleuses colossus coalesces colessees coulisses closes calces glozes glazes calices calyces culices glasses glossas calloses calluses cullises glassies
colzas balsas plazas salsas chalazas
colza colessee coulisse coulees coolies cols colossi collies colies coleus coles cloze colas coils coals coalless coalesce coalas cools coulis cowls