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.
courage carriage corgi gorge gurge garage greige grudge
courage rage urge purge ferriage triage surge ragee barrage borage burgee forage peerage dragee garage gurge marriage mirage moorage carriage
coria curia curiae cougar scour cor cur