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.
retuse rets reatas reduce reties riotous reds ruts rots rats rites rides rotos roots routs redds rotes riots rudds redes rotis reeds rotas rates writs redos rodes ratos reads writes routes rodeos riatas raitas radius redias redoes readds rottes readies roadeos roadies rowdies
retuse foetus tuts situs setose fetus poetise mutase meatus lettuce quietus ketose coitus hiatus vatus footsie douse taus etuis betise battues tuis touse lotus medusae outsee potsie riotous setous tootsie tutus
ret reata rete retie arete fret fretty pretty tret