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.
whittle wattle wittol whitely whitlow wittily widdle wheedle wetly waddle widely weedily
vittle whittle little cuittle kittle tittle fettle wittol kettle wattle battle title cattle dottle cuttle guttle kittel nettle citole rattle mettle settle mottle tattle bottle pettle pottle shuttle
whit white whitey whity witty wit