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.
raggies raggees raggs rags reggaes ragas rakes rakis rakees rogues rookies rickeys recs regs rugs rigs ricks rykes racks reeks recks rakus rugous wreaks wracks recuse rugose roques rekeys wrecks wricks raucous
aggies baggies biggies buggies veggies jaggies luggies moggies piggies raggies doggies haggis loggias muggees raggees reggaes
ragg raggee raggy braggy craggy draggy rag