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.
benign banian bunion banana
benign venin onion minion leonine kinin quinina gonion conine conin guanin canine inion ronion rennin tannin pinion wanion panino venine fanion guanine pennine panini munnion linin quinin quinine anion banian nine bunion aeonian eonian dynein reunion union renin hyenine
ben bani bean beanie beano been bene benne benni benny biennia