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.
bleach belch blotch blotchy blueish blush bluish bolshy bolshie bullish
bleach pleach leach clach slatch laich latch leachy leash lech leech letch belch fleche fleech fletch halacha caleche klatch loach welch
bale belay bile blae blah blaw blew blue bluey bola bole bylaw able