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.
duettist dottiest detest dotiest doughtiest deediest tattiest didst tattooist dadaist deadest tautest tidiest dowdiest
duettist footiest jettiest coattest hootiest haughtiest hottest pietist rootiest poutiest sootiest nittiest dotiest peatiest nattiest doughtiest gnattiest tattiest meatiest wettest guttiest wittiest lutist chutist cattiest attest fittest pettiest batiste battiest goutiest fattest fattiest bittiest pottiest ruttiest rattiest zootiest nuttiest autist dottiest nettiest phattest knottiest wattest mitiest whitiest quietist chattiest matiest shittiest