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.
stacker sticker stocker stickier stockier stoker stagger stooker staggery staggier sidecar
tacker dacker attacker stacker dickier deticker docker stocker ducker sticker daiker decker dicker duckier tucker retaker tackier stickier taker stockier ticker shtickier
stack stake steak stick sticky stock stocky stuck