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.
claps clips clops collapse clepes calypso clypeus collops calipees glops kelps gulps calliopes callipees galops kalpas keleps gallops kelpies
laps dewlaps claps slaps flaps jalaps relapse juleps flops palpus palapas lollops alps fillips salps saleps collops elapse flips gulps beleaps clops slips lapis galops blips lapse shleps helps pulps clips gallops leaps plops palps milpas jalops kelps salpas glops keleps tulips whelps kalpas lips collapse lops pullups polyps slops dollops wallops shallops yelps
clap clepe clip clop clypei culpa culpae