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.
belay belly bel blah bola bell blae blaw billy belie bialy blowy belle bylaw bulla bluey below bally boyla bully bellow blooey bullae bailey bal billowy bile bowl blew bail bale boll bole blue buhl boil bill ball blow bawl baal bolo bull
relay belay delay lay nelly feyly felly fella eely belly mealy vealy flay allay cella tela telia waylay chela sheila flawy quelea cullay slay vela paella rely jelly seely clay selah play kelly delly newly telae telly welly chelae shelly