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.
poshly pushily patchily pitchily patchouly petiole pachouli
lushly poshly rashly mushily tetchily muchly richly shul gushily pushily patchily itchily pitchily gauchely shyly cushily fishily shily bushel shaly botchily bitchily bushily techily touchily
posh pash pasha pish poisha pshaw push pushy