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.
stalk stalky stalag suitlike stelic seedlike
talk bytalk outtalk stalk talc talky taluk stalky
stale stall styli sadly setal steal stela stelae stelai stella stele stile still stilly stole stull style istle