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.
flags flogs flacks flakes flax flocs folks flics flaxy flicks valgus folksy flukes flecks flocks vulgus folkies falx flex flux
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
flag flaggy flack flak flake flakey flaky flog