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.
clags clogs cloaks gulags clacks cologs colugos claques colleagues galagos cloacas glugs calks collogues clicks cleeks clucks clocks colics gloggs caulks kulaks calicos cliques cloques calques calicoes cowlicks gallicas glaucous calx kilogauss
lags gulags clags flags slags sawlogs algas plugs lugs flogs logs slogs glugs dialogs bowlegs tilaks kulaks belgas vulgus galagos valgus lilacs blogs polkas cologs clogs slugs legs duologs lacs shellacs
clag clack claque cloaca cloacae cloak clog cloggy