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.
toons tons toonies towns tones tonus tauons tonnes townees tens tins tuns tans townies dons tonneaus downs tense tunes donas teens tines tunas donsy tynes tansy tains tenuis donnas tennis tineas teensy tenias donees tenues donsie taenias tunnies tannoys tennies tenuous donnees tawnies tawneys dans dens dins duns
boons coons poons goons zoons noons loons toons moons ons joins sonsy peons coins conns fons aeons gowns sons koans nones eons pons mons monos donsy owns ions wons phonos foins neons leones cons muons phones noose peones donas tauons nouns tons hones loans loins hons scions zones ones jones bones bonus knowns lions cones nonas pones conus onus monas phons paeons johns cions fohns kaons moans onos roans hysons sones pions dons downs tones quoins tonus towns yonis
toonie toon ton stoney tone toney tonne tonneau tony town townee towny atone atonia atony stone townie stony