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.
tons towns tonus toons tones tonnes tauons tens tins dons tuns tans townies toonies townees donsy tonneaus donas tunas tains tynes downs tense tansy tines teens tunes donees tennis tenias tenues donnas tineas donsie teensy tenuis donnees tennies tannoys tunnies tawnies tawneys taenias tenuous dens duns dins dans dawns deans denes dense dines dinos dunes dynes
boons cons toons tauons zoons scions cions pons peons ons neons eons fons phons hons ions aeons goons paeons tons dons sons hysons poons pions noons coons muons moons mons loons lions kaons wons
ton tone toney tonne tonneau tony