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.
preanal perennial perennially perineal peroneal pronely prunella prunelle prunello
preanal renail renal vernal geranial carnal cranial morainal tarnal treenail trenail
paranoea paranoia pirana prawn preen purana pyran pyrene