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.
hiatus hits hats haets hates heats heights hideous huts hots hets hades hides heads hoots heydays hoodies hotties houdahs howdahs howdies
vatus hiatus meatus fetus mauds hates fates ratos hats heats bahts lotus gaits battues coats nates baits ghauts moats foetus meats cats aits peats jatos gates bauds qats tuts shoats shiatsu tates chats wheats reatas watts waits gauds sates lats tauts mats dawts fatso situs datos katas seats oats riatas pats ates bates cheats fiats setous gnats riotous tats vats dauts whats neats tutus rats etuis patsy pates goats eats feats taus gats beauts kats haets coatis gateaus quietus tuis bats mauts matts mates lauds cates fats batts boats coitus shiatzu beats ghats rates retuse satis dates doats teats wats chateaus yauds
hit hat haet hate haut haute heat khat