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.
clogs cologs clags gloggs clocks cloaks collogues cloques calicos cloacas colugos calicoes glugs calks kilogauss gulags cleeks clucks clicks colics clacks caulks colleagues colloquies claques galagos glucose calques cliques cowlicks glaucous killocks calx
blogs clogs slogs duologs cologs flogs logs dialogs sawlogs clags algas plugs glugs slags flags slugs belgas blocs logos flocs lugs bowlegs gulags valgus legs vulgus gloggs lags telcos
cloggy clog clag cloaca cloacae cloak clock cloque colog glogg eclogue