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.
reatas riatas raitas rets rats reads rotas rates ratos redias readds retuse reties readies reds ruts rads rots roads redes rotes rides redos rotis roots routs reeds rites rodes raids writs riots rotos redds redoes radios rodeos radius routes writes rottes riotous roadeos roadies rowdies
katas reatas riatas tas bettas mats lyttas lats haets fatso meats fetas coats ghats hiatus jotas pitas getas peats pats fates aits taos moats gaits gats baits matza betas oats ates raitas cats tads shittahs sates chetahs cheats ghauts wheats watts zetas waits teats seats tats vats qats dauts ditas teas dates lotahs stoas gnats ratos boats taus nates rotas eats tass hats kats pates quotas mauts matts bahts etas beauts cates batts litas jatos pietas bats hates biotas vatus mutase fats botas meatus coatis heats patsy lotas pittas goats feats bates rates gates satays neats fiats cottas rats nadas suttas taws datos mates doats dawts iotas tates tauts stays utas wats dadas whats chats beats cheetahs shiatsu satis shoats
reata rat ret crate reared prate oread great grat raita read bread rate rato ratty frat dread treat tret fretty readd ready brat retie grate drat pretty bready prat rete treaty tread orate bratty create arete irate riata fret urate