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.
routes routs rotes rottes ruts rots rites rodes roots rotis rotas rotos riots rates reties writes redoes rodeos rowdies roadies riotous roadeos rods reds rets rats ratos redes reads roads redds redos rudds roods rides reeds writs radius readds redias reatas reduce radios retuse riatas raitas readies
butes sautes mutes cutes jutes routes shutes lutes utes chutes uts fouettes quotes fyttes bates ludes patties notes mottes cooties butts mattes hates gates buteos knouts duets beauties dauties putties cotes metes teas cuts ates coatees pities tews boites dues booties outs mates bouts phuts tees buts rotes suites lottes shotes dites teds tatties titties cetes touts tuts pieties sties tutus whites nutsy whities suttees chitties mateys duties ghettoes lattes dotes cutties jetes gutsy sites laities puttees juts catties cities pouts gites vetoes butties fates goatees potties hotties ties footies suets buttes louts writes dudes putts cutis beauts stews fatties cates jetties ruts puts muts nudes mites dates dauts dawties bites mauts ghauts battues pates huts gaieties wytes cuties cutesy reties quits poetess kites gouts votes kytes sates tauts motes tets moieties nites gudes guts fetes nates bytes cites suits kitties mutts leudes mottoes jutties autos bootees toes cuteys rites settees totes routs tutees tutties rottes utas nuts rates ditties duits whiteys deities wites bawties shouts tates 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