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.
repeller repealer replier rippler ripplier
cupeller repeller speller pallier peeler poller puller appealer appellor cupeler repealer spaller spieler spiller shapelier
repel repeal replay replow reply repoll ripely