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.
coital coitally coattail catalo cattail cattalo cuittle kittle cutely cuttle coddle caudal caudle cattle kittel cadelle cattily goutily keitloa quietly caudally
vital chital coital petal tall medial geoidal cattail coattail fatal fitly cattalo luteal hiatal hyetal mutual radiale rattail retail setal stall zooidal dotal title chaetal foetal nidal tali notal ratal tale tala tail catalo tael teal metal meatal redial radial audial ritual stale steal detail tidal total natal dial fetal hyoidal
cot coat coatee coati coot cootie cote coteau cotta cottae couteau scot scottie