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.
peens pens penes peons peins penis peans pensee paeans paeons pennis peones peonies pans puns pawnees pins pennies pons pansy punas pawns pones pians panes pinas pence pains pions pines poons pannes pianos pinnas ponies pinnies hyponeas hyponoias
queens teens peens keens wheens sheens weens ens donnees miens paeans whens pens knees dienes hymens weans peans gens veenas wrens veins pawnees neons penes mensa sense deans yeans hyaenas weensy lenis cense tense teensy scenes lenes dens liens rouens bens ranees lense eons faenas fens nenes scenas kens genus means foehns mense penis jeans venus hens lens leans queans aeons wens paeons peons lenos benes zeins reins hyphens sensa peins denes kenos beans menus genes tens townees dense whenas donees hygienes hyenas yens
peen pen pean pein penna pennae penne penni pennia penny peon peony open