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.
panini panino pinion pennine pinon pennon pinene
panini venin onion minion leonine kinin quinina gonion conine conin guanin canine inion ronion rennin tannin pinion wanion panino nine fanion guanine pennine venine munnion linin quinin quinine banian benign anion bunion aeonian eonian dynein reunion union renin hyenine
pan pain pane panne pawn pawnee pean pian piano span