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.
salpas salps saleps saloops slaps slips slops sleeps slipes sloops slopes slypes
kalpas milpas salpas palps fillips laps glops claps flaps saleps pullups plops lips lops flops alps blips salps slips dewlaps tilapias wallops chalupas shleps gallops lipase clops jalops whelps slops dollops flips slaps kelps palapas juleps jalaps tulips pulps shallops polyps palpus helps clips keleps lollops gulps galops collops yelps
salp salpa salpae salep saloop slap slip slipe slippy slop slope sloppy slype