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.
beady bead baddy bawdy bed bad beauty bade bedu bawd body baud beat beta batty bawty biddy boody betta baaed beaut buddy bedew booed beedi bateau baddie bud bid bat boughed bod bet batteau bait bute baht boat bota bide bate beet bidi bite batt bode byte
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