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.
knell kneel knoll nelly knolly nellie nielli niello null noel nill newly nullah nil nail nala noil nolo
knell ell jelly kelly quell mell kneel hello jello nelly paella noel cella cello selle delly duello telly welly shelly niello jell bell nill felly fella fell belly belle knoll hell nielli null cell celli sell dell duelli tell well shell yell