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.
passed pissed paused passado passade paced pseud paste posed peised peaced poised pastie pseudo posset past psst pasta pasty piste poussette pesade peseta pieced posada postie pst hypoacid
biassed tossed bussed pissed chassed fussed cussed dossed hissed sussed missed dissed guessed kissed yessed wissed massed gassed moussed messed mossed bossed mussed cessed fessed passed jessed sassed posed rosed asset guised raised russet dosed loused reissued dowsed physed busied issued rased seed based noosed paused lassoed visaed reseed chowsed cheesed chased wised toused tissued tawsed mused disced phased cosset roosed housed jassid ceased cosied noised moused viseed vised sued doused reused poised goosed boused loosed eased posset liaised tasset nosed basset bused reseda fused hoised seised feased gussied leased misset knesset soused daisied lased hayseed cased bowsed gessoed biased roused caused pseud teased peised used gusset lysed choused hosed
passe passee pass pas pias spas pease pussy peas posse piss pase pays paseo paise paisa puss paws paps pause upas