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.
collogues colloquies colleagues cologs cloques clogs cliques colugos claques calques clags kilogauss colics cleeks clocks clucks cloaks gloggs cloacas calicoes cowlicks glaucous killocks calks culex glugs
collogues dialogues duologues cloques plagues logs
collogue colog colloquia colloquy clog