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.
slypes slipes slopes salps slaps slips slops saleps salpas sleeps sloops saloops
blypes slypes callipees elopes floppies jalopies jaloppies lopes calipees loupes calliopes clepes clypeus kelpies polyps polypus slopes calypso slipes talipes
slype salp salpa salpae slap slip slipe slippy slop slope sloppy