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.
heady head had heyday heydey hade hied hued hoed heed heat haed hoody howdy hid hat hod haughty het haet hate haut hide hood
beady heady leady ready weedy waddy faddy teddy caddy bead knead seedy paddy head neddy baddy bawdy eddy dead mead deedy readd meaty read reedy gaudy daddy needy lead lady toady peaty wady shady