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.
sons sonsy sones scions hysons sonsie suns sans sins sonnies snaws sensa cions zones sinus sunns sines sains sinhs zoons sanes snows sense sinews sansei sennas sunnas seines sanies sensei saunas scenas scenes sanious sawneys siennas sinuous sunnahs zins cense since zeins
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