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.
salep salp salpa sleep saloop salpae sleepy slap slip slop slipe sloop slope slype slippy sloppy
salep alp shlep salpa leap beleap bleep jalap jalop julep clepe galop kalpa kelep palp palpi pileup salp sleep shlepp
sale sal sail sall sallow sallowy sally saul seal slew sloe slue sole solei isle