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.
peepul pepla papula papule papulae peppily papal pipal pupal pupil people papally papilla
peepul pul tepal pula pule puli pull copula cupula papula cupule papule pepla repel reply sepal deeply wheeple