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.
routs routes ruts rots rotas roots riots rotes rotos rotis rottes rets rats riotous rods redos rates ratos rites rudds roads writs rodes roods radius writes reatas retuse radios reties rodeos raitas redoes riatas roadeos roadies rowdies rads reds rids ritz
bouts louts shouts touts gouts outs routs pouts knouts uts botts lotos mots votes butts motes knots coots lotus odious huts lutes hideous rotis beauts cots loots luteous phots shotts rotos lotas nuts vodous utas boats putts oats douse lots cotes suets shutes shotes shoats chotts jots tots tootsy toits tauts duits dots doits dauts soots ouds tuts rotas hots mutts boots autos riots jotas footsy pots cutis modus mutes mauts kotos poets rots photos butes botas quotas nodous beauteous piteous sots nodus suits notes goats potsy foots iotas jutes phuts cuts coats fatuous quotes juts nutsy cutes moots biotas quoits touse bots sautes guts nowts quits puts ghauts hoots gutsy roots moats muts routes rotes buts ruts iodous doats riotous duets dotes duteous tedious toots totes motts tutus utes setous wots chutes shoots shots oots shuts
rout route rot rut croute trout riot prutah root proud rooty protea rota grout rote grotto roti roto rutty grotty wrote grouty brut protei brute pruta rotte trot grot trouty