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.
cottas cots codas coots cotes coats quotas coitus coatis cooties codeias cutties catties coatees cads cods cuts cats cutis cutes kotos codes goads cades gouts cates caids coeds goats cadis katas cuties quoits kotows cuteys cutesy caddis quotes caddies cutesie gateaus goatees kitties kowtows
bettas lyttas pittas suttas cottas tas netts mottos tets ditas riatas bitts batts katas tots mutase pietas matts tads stays tuttis lattes teas tats shotts chotts cheetahs utas tuts tits dittos buttes dattos mattes satays rotas reatas putts fouettes ghettos stoas lotahs mottes fetas litas mitts iotas botts botas lotas taos jotas taws lottos quotas rottes betas etas zetas biotas setts fyttes motts mutts pottos raitas butts ottos getas tass taus pitas lottes watts chetahs shittahs yetts
cotta cottae cot cattie catty coat coatee coati coot cootie cote coteau couteau cutty scot scottie