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.
because becks beaux beaks begaze bagasse bugs begs bags backs bogus bikes bucks bocks bakes buckos biogas bikies bekiss bagass backsaw baggies biggies boocoos bookies buckoes bucksaw buggies
cause because case causey recuse scouse showcase