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.
belt blet blot bolt blat bleat built bloat bield bluet billet ballot bolete balata belaud blotty belady blight boleti belied bullet ballet blotto belled bailout bellied blighty bald bled bold blate blite blood blued baldy baled blade build bleed
belt felt gelt kelt melt knelt pelt celt delt welt
bel belay belie bell belle bellow belly below