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.
rotas rots roads rotes riots rotos routs roots rotis rottes riatas raitas routes reatas roadeos rets riotous ruts roadies rads rods rats roods raids ratos rodes redos reads writs rates rites readds reties rodeos redoes radius retuse redias writes radios readies rowdies reds rids ritz
biotas quotas jotas iotas botas rotas lotas tas taos getas hots photos mots quoits louts knouts gouts boots pietas votes poets botts motes phots hoots lotahs sots lots rotes footsy mutase rotos bettas cots riots sodas dotes shotts shotes shoats chotts cheetahs woads touts totes toots toads tads zetas oots doats pouts stoas tass coats routs knots notes reatas taus lotos oats pots potsy boats roots toeas rotis bouts lotus kotos pitas soots loots bots outs betas etas teas taws katas coots codas motts jots cottas pittas goads loads litas quotes moots satays lyttas ditas raitas moats foots roads nowts odas rots cotes goats stays riatas fetas doits suttas dots tats toits tootsy tots utas wots chetahs shittahs shoots shots shouts
rota rot roared protea grotto groat riot road roadeo roadie root rooty rote roti roto rotte rout route wrote broad grot grotty protei trot