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.
prick pricky pyric park perk pork prig parka perky porky peruke perique prog
rick wrick brick crick prick trick hayrick derrick dreck carack wrack auric pricky frock wreck reck hayrack brock xeric naric boric daric rerack ceric pyric hydric ferric ruck crack crock shriek toric triac barrack areic truck baric carrack rock erica arrack lyric lorica track trike ureic choreic cruck heroic myrica rack bricky tricky trock yttric uric choric traik shrike