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.
annona anon anion
nona annona noun noon none neon known cannon anion mannan quinina munnion onion pinion renown ronion tenon wanion gonion bunion anon guenon fanon phonon honan inion ionone canon fanion quinone minion ninon pennon pinon reunion xenon union chinone