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.
ducats ducts diquats dicots dakoits dacoits tuckets decades dugouts dockets tacts dacoities dakoities decodes tackets tickets toquets takeouts
cats scats ducats agates liquates cates coatis equates cots cuts coats wyliecoats loggats pacts picots recoats diquats vacates legatos rectus coequates rictus cactus scads scatts scuts skates squats ducts ictus cads fugatos recuts rectos coacts goats kats loquats nougats locates negates gates ligates reacts peacoats acts qats katas ikats cycads facts gats gaits scots sects skats dicots legates nicads tacts
ducat decade ducked duct educate educt