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.
betta beta bet batt bott batteau bitt beat butt bota beet bead biota beaut beady butty battu bitty batty butte bateau battue beauty bed but bit bad bot bat bedu baud bait bute bate baht bout bawd bite bode bade bide boot boat byte
betta eta vitta ghetto fouette feta beta meta netty vittae pieta reata setae sutta chaeta cheetah shittah petto geta jetty petty cottae gutta guttae lytta lyttae nett petti cotta pitta seta sett zeta chaetae chetah yett