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.
riots rots riotous routs rotis rotos writs rites rotas roots rotes radios routes writes rottes raitas riatas rets rods ritz rids ruts rats rodes ratos rides roods roads raids rates ritzy redos retuse redias rodeos reatas reties radius redoes readies roadeos roadies rowdies rads reds
riots its iotas lotas radios mitis biotas coots foots votes kotos moats bitsy lidos motts gites adios photos goats kites potsy lits poets pitas hoots fidos notes routs louts quits bits audios motes oots rotes suits coats tedious shotes chotts wots ditsy wites touts diets whites dots zits toots tits sots shotts shoats roots cots doits dites nites eidos rotos baits botas oats totes situs lots writs sites knots jotas quotas fiats quotes moots bitts litas kits odious boats hits footsy boites pits lotos phots fits bots loots writes mites hots gaits coitus outs quiets jots mots mitts botts bites gouts cotes aits lotus gits nits rotis boots zitis bouts dits pots nowts rots quoits rites dotes raitas soots knouts cites sits pouts knits tots rotas whits shoots shots shits chits doats wits waits titis ditas duits didos tootsy toits suites shouts
riot rot trite protei grotty grot grit crit frit brit write writ route rout rotte roto rote roti rota rooty root rite riata raita wrote britt fritt griot gritty grotto protea triode trot