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.
lessons lessens liaisons lysins leucins license loosens laciness laziness licensee looseness lousiness licence lucence lucency lysines
caissons lessons sons disowns seasons cessions poisons missions mesons liaisons hysons sones sonsy bassoons bisons bosons essoins masons foisons messans gossans passions gossoons reasons quassins scissions lessens sessions fissions weasons