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.
fissions foisons ficins fussiness fusains foziness fuzziness
fissions sessions cessions missions scissions passions sins sons sains cassinos masons resins cousins hysons gossoons mesons cassinas lysines caseins bassoons casinos sinhs foisons sinus scions basins raisins hessians disowns seisins sasins eosins cions osseins eosines essoins liaisons sonsy rosins cuisines sines cassines quassins lysins reasons caissons lessons cosines fusains bosons bisons poisons seasons sones weasons