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.
bowl bolo boll bole blow bawl boil bola blowy below boule boyla billow boulle bellow bal bel billowy blew bull bile bell bail baal blaw bale bill ball blae buhl blue blah belay bully biali bluey bialy bally belly billy belie bulla belle bylaw
bowl fowl howl jowl cowl owl yowl