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.
rant riant runt rand rent rainout rente runty ranid randy rained rennet runout reunite ruinate rend rind rynd rindy rondo round
ant hant giant cant quant leant meant pant rant riant want chant