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.
salpae salpa salp salep slipe slope slype saloop slap slip slop sleep sloop sleepy slippy sloppy
culpae salpae slype lipa lipe lope blype elope clepe kalpa culpa kelpie milpa palapa salpa slipe slope chalupa
sal sail sale sall sallow sallowy sally saul seal