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.
nouns nuns nones neons nonas noons knowns nonuse nowness nonnews nans naans nenes nines nanas nonce nuance nuncio nannies newness ninnies nonissue
nouns ons uns monas boons lunes conns leones quoins phons aeons huns bones munis gowns muons mons hones punas nones ones pons loons johns buns cones jones aeneous vinous roans runes bonus sanious yonis downs wons cions tuns tunas ruinous toons tons sones tenuous duns bunas peones dons neons suns zoons cons sonsy owns scions nous pions coons phones bunns loans koans hons poons ions faunas loins lions moons fons eons guans venous fohns coins fauns paeons phonos lunas kaons conus lauans guns onos noons funs foins donas quins muns shuns heinous tunes moans goons rouens knowns runs peons monos nuns pones onus sinuous sunns ruins joins nonas zones hysons donsy dunes saunas tauons tones sons tonus towns puns yuans
noun nun neon nona none noon anon