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.
blotch blotchy belch bleach blush bluish bolshy blueish bolshie bullish
blotch latch slatch klatch letch litchi loach loch blotchy fletch flitch cloche clutch clutchy cultch glitch glitchy guilloche moloch slouch
below blooey blooie blow blowy bolo