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.
repiner ripener
repiner pinery pinier pinner opener ripener spinier spinner spinor deepener cheapener
repin repine rapine rapini orpin orpine