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.
material materially materiel mitral maturely
material derail trial atrial federal lateral literal materiel notarial retral retrial ruderal sidereal sterile tutorial waterily
mater matier matter mattery mature meter miter muter amateur