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.
quoins quins quinsy quinoas coins queans koines queens quince guineas cons guns kins goons conns gowns cains cones kinas coons koans kaons kinos gains kains guans kines coneys kinase guanos conies gooneys goonies guanase guanays gunnies coyness gainsay goannas
foins joins loins coins quoins ons ins bones mains noise phonos fohns finos vines moons bins loons johns jinns linos ruins pones pins vinos lions koans zones knowns vinas onus cones linns quinsy miens nouns nones poons tins cions pains reins mines coons monas gains inns tons downs tauons unnoisy whines scions wines zines wins sins chaines chinas sonsy chinos dines shines yins sines toons cons hyponoias peins nonas dons dins leones roans kines boons sones jins pines koines ains pians onos hons fins kinos kaons muons minus loans aeons ones bonus cains minas mons noisy pons tines pions paeons genoise nines quins zins phones bines minis monos gowns fons finis gins conus phons eons ions lines kins veins rins hones peones rains hysons hins liens kains cines conns donas dinos noons rinse goons sinus kinas moans pinas jones fines peons neons lins owns tonus tones winos donsy tains towns wains sains whins zeins sinhs seines wons chains sons chines zoons chins shins yonis
quoin quin quinoa equine quicken squinny