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.
stockier stocker stickier stoker stacker sticker stooker staggier stagger staggery
duckier dickier stockier shtickier tackier stickier attacker ducker stocker sticker tacker tucker ticker docker dicker decker dacker deticker stacker
stock stocky stack stick sticky stoic stoke stook stuck