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.
corby carboy corbie crabby carb crab crib curb carbo carob caribe grabby grubby garb grab grub kerb
forby corby orby orb ruby forb foreby herby hereby carboy nearby sorb derby whereby choirboy
cor coir core coria corrie cory cowrie cowry score scoria scoriae