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.
giddy gid gied geoid ged git geed gite
giddy widdy middy biddy kiddy baddy paddy toddy eddy teddy faddy didy fuddy soddy caddy ruddy buddy cuddy midday daddy muddy duddy neddy tidy noddy waddy kiddo shoddy