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.
playdays plaids platys pleads pleiads plateaus payloads pleiades plods plats palladous pleats plates plaits palates pelotas platies ploidies palliates pelts plots palets pilots poults
holydays playdays holidays welladays