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.
ready read reedy readd rad red redo rede rued redd road raid reed reata ratty ruddy rowdy radii wried radio redia roadie roadeo rediae rat rod rid ret rota rete rude rote rudd rato rode rite rate rood ride
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