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.
grabs crabs garbs grubs grebes carabaos kerbs curbs cribs carbs carbos carobs krubis carboys caribes corbies caribous
crabs drabs grabs mihrabs shrubs urbs carbos drubs carobs rebs garbs cribs ribs robs rubs airbus grubs arbs barbs verbs dribs burbs curbs orbs forbs darbs herbs sorbs kerbs carbs turbos barbes cherubs yerbas
grab grabby crab crabby garb grebe grub grubby