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.
supposes spouses sepses speises speisses spaces spices spazzes species sepsis
apposes deposes poses supposes reposes eposes opposes reopposes popsies apses lapses gipsies biopsies spouses papooses copses opuses upases gypsies tapises lupuses posses lipases poises gaposis sepses posies pases pappooses puses lapises woopses