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.
pill pillow pial pili poll pull pily pail pile pall pillowy pally pilei poilu pilea pilau pilaw pallia pulley paella pollee pol ply pul pal pole play pule plea peel ploy plow plie pale puli pele pawl paly polo pool plew poly pula peal palea polio
bill kill shill will dill vill hill ill gill jill fill maill quill mill nill pill rill sill zill till chill yill