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.
patent patient patentee potent pattened pedant patined patinaed patinate pudenda
tent detent latent patent potent attent stent tenet detente stunt audient tend rident tenty quotient mutant retint nutant patient coattend cadent rodent natant stint tint attend dent whatnot
paten patin patina patinae patine patten poteen