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