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.
renin rennin reunion renown ronion
venin renin benign banian anion guanine kinin quinina bunion leonine panino onion pinion aeonian pennine rennin ronion dynein tenon wanion minion panini nine guenon venine inion canine conin conine gonion fanion guanin quinin quinine linin munnion eonian reunion xenon tannin union hyenine
rani reign rein renew wren arena arene bren erenow frena