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.
sonsy sons sones sonsie scions hysons sins suns sonnies sans snaws sunns snows zones sense sains cions sines sinus zoons sanes sensa sinhs snazzy snoozy sunnas seines sneezy sinews sansei scenas sensei sanies saunas sennas scenes sanious sawneys siennas sinuous sunnahs zins
donsy sonsy ons muons monas noisy mons quoins eons conus onos hysons loons neons koans nouns bonus aeons conns joins nosy goons pions peones sones ions wons unsay boons towns tonus linsey tones tauons downs bones roans zoons dons onus foins loans paeons gainsay coins pons nones cions monos moans moons johns tansy nonas hons unnoisy fohns kaons gowns ones peons jones cones knowns noons donas coons phonos tons hones fons quinsy pones leones loins pansy scions lions owns weensy nosey sons phons zones phones poons cons teensy toons yonis