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.
etnas
etnas codeinas fattens tautens putons kittens tens tans jettons duennas heightens donnas madonnas mittens donas phaetons buttons neatens lattens phytins mattins tenias shaitans chitins titans stuns patins biotins petunias whitens patens seitans nitons taenias rattons cottons rhytons latens cytons mutons rattans catenas tins latinas muttons boutons futons tons medinas lattins phytons matins battens jetons atonias tunas cutins pitons zeatins tineas photons tuns ratans newtons moutons rutins quietens retinas cotans rattens batons satins chitons hypotonias wheatens pattens betons patinas setons titanias witans sheitans