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.
bel bell belay below belie belly belle bellow bal buhl bawl blew ball blah baal bale bowl bile bola boll blae boil blow bill bolo bull blue blaw bail bole bully bluey bulla blowy bally boule billy biali boyla bialy bylaw bailee bailey bailie billie billow blooey blooie boulle bullae