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.
quasses quassias cusses gasses cuisses guesses gausses gussies cases gases guises cussos kussos causes kisses cassis casease cassias causeys koussos caseose quizzes coses gazes casas casus coseys cosies gauzes gooses caseous gaseous
asses masses sasses passes biasses wrasses chasses lasses basses gasses quasses tasses musses issues cassis mousses mosses pauses isseis easies bassos fusses leases massas causes busses eases gases phases oases pusses cases loesses cissies reissues hawses reassess gausses chiauses chausses losses sissies chaoses wussies wisses tussehs tissues tawses daises gessoes disses kisses lessees sises cuisses cesses assess pisses messes lassies hissies fosses jesses bases gneisses fesses pussies peases raises gussies misses fasces missies ceases rases pases dosses lases nesses esses possess hisses bosses bossies poussies guesses cusses hussies josses lassoes biases liaises posses feases vases lassos lassis passus baases chases sassies sisses susses dassies tassies teases tosses tusses wusses chaises chassis chesses yesses
quass quassia quais quasi quays queasy aquas quags oquassa