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.
dayside daisied dacite decide diacid deicide deciduae dissuade taste dosed dazed diced tsade disced dissed dossed doused dowsed tasset decidua dizzied
quayside dayside wayside side aside beside mysid naysaid reside residue seaside