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.
drapey drape drupe drippy droopy dorp drip drop trap droop tripe trope trippy troupe towrope
drapey grapey rape ropey frappe harpy crape crappy crepey grape grapy gripey sarape serape drape sharpy