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.
roots rots rotis rotos routs roods riots rotes rotas rottes routes rodeos roadeos rats ruts riotous rets rods roads ratos redos rodes rates writs rites raitas riatas redoes retuse reties radios writes reatas roadies rowdies rads reds rids ritz
foots hoots coots loots shoots oots roots soots moots toots boots gouts footsy doodoos cots hoodoos louts phots roods koodoos pouts bots quotes outs doats quoits votes shoats rotas motes goods shotts shotes wots touts totes foods tattoos dotes botts mots doits rotes riots voodoos routs lots dodos rotis rots jotas moods dots rotos moats bouts hoods kotos iotas sots notes nowts lotas hots lotus goats coats biotas photos botas pots knouts quotas motts jots potsy boats poods lotos poets knots cotes oats tootsy tots woods chotts toits shots shouts
root rooty rot wrote protei route grotty rout grot broody brood roto rotte roti rote rota rood riot grotto protea trot