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.
applaud applied appalled appealed appellate applet aplite
applaud plaid plead replead upload shipload
appal appall appeal appel appellee apple apply