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.
causals casuals causeless gasless quezals quezales
causals sals usuals dossals reseals resails ousels missals masalas casuals housels visuals vassals fusils fusels assails seals sauls salsa sales sails nasals reassails resales sisals tousles wassails
causal causally casual casually