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.
coatis coats cots cats cooties coatees catties cotes cadis goats cutis caids coots cates codas cuties caddis cottas coitus caddies cutties codeias goatees kats gats cads qats cods cuts gaieties cutes goads codes qaids gaits gouts katas qadis gadis kotos gates kadis cades coeds kotows quotas gaddis cuteys quoits cutesy quotes gaudies goodies kitties caddice caducei kowtows cuddies cutesie gateaus
coatis satis tis hotties beauties oats gaieties qaids kitties putties jetties mauts baits pieties fates hates bates mats booties cadis chitties titties duties betise tauts datos batts katas gadis dawts seats vatus goats feats fatso coats waits laities shoats chats rats tuttis titis tats ditties dauts zitis watts poetise sates sadis patties rotis reties pats ghauts heats rates bawties gates catties maids meatus eats wheats butties pates cutties nates cuties mitis moieties cates footies bats gats tuis padis cutis meats gaits vats moats aids jatos ates kats mates caids metis dais potties cities hiatus qadis cats pities haets etuis ghats beauts ties bahts fats fiats hats fatties jutties patsy lats kadis matts dates neats saids peats daisy patois teats qats reatas aits raids ratos cooties gnats dawties boats doats sties cheats whats wats dauties wadis tits tutties whities deities beats tatties tates riatas shiatsu yetis
coat coati coatee cat cot cate scot cattie scatt catty coact coda goatee cote goat cootie couteau coot cacti coteau scat cotta scatty cottae scottie