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.
caused cased cussed caste guised gassed cosied caseate gussied casette guessed cast cassette coset gazed coast cosset costae cozied goosed casita gusset kissed cassata coesite gaseity quizzed quayside
boused choused fused caused roused mused paused bused moused soused housed loused used toused doused reused gussied feased messed cased biassed hosed issued goosed noised liaised physed gessoed cosied visaed posed gassed passed raised busied seed sauced fussed dosed chowsed cheesed chased wised tissued tawsed missed reissued daisied cessed disced poised bowsed lassoed fuzed phased nosed pissed suede sued peised roosed guessed guised moussed lysed mussed cussed noosed loosed lased pseud leased seised biased reseed jessed viseed fessed vised bossed based hoised reseda ceased rosed dossed rased massed bussed kissed tossed hayseed hissed sussed sassed deuced dissed dowsed teased mossed wissed chassed eased yessed
cause causey casa case cassia caws cays cues cuisse cuss cusso gauss auks ecus caucus ocas