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.
curtail curtal curtly courtly quartile cradle credal curdle cartel cordial creedal grittily cordially kirtle crudely gradual greatly griddle
curtail virtual tortile dirtily mortal marital quartile curtal heartily hartal fertile ratal brutal artily artal aortal retail rattail portal tartily shirttail
curt court curate curet curette curite kurta