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.
basset bassett bast biassed beset boast beast baste based bussed bossed biased beastie bust best besot boost bused busty beside bestow boused bowsed busied basidia
asset russet basset misset tasset cosset knesset gusset posset set seta dossed dissed sett messed moussed bossed reset reseat russety jessed mossed mussed peseta suet sassed misseat tossed coset chassed fessed hissed guessed cessed massed cussed disseat bussed keyset bassett beset pissed gassed missed kissed seat psst passed fussed sussed miseat biassed wissed roset yessed
bass basso bassy bassi bas bossy abase abas byssi buss bias boss boas bays base baas obas