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.
cloque claque clique calque cliquey colloquy collogue colloquia cliquy cloacae clog cloak colog clock cleek cluck colleague calico cloaca cloggy colugo quaylike
cloque calque claque clique cliquey collogue colloquy lalique plaque pulque relique siliquae silique dialogue duologue
calo cloy coequal coequally coquille