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.
verbs verbose forbs firebase forebays freebase freebees freebies
herbs verbs kerbs burbs orbs drubs drabs barbs zareebas barbes cribs shrubs sorbs grebes arbs carobs carbs carbos forbs urbs robs airbus rubs garbs dribs darbs zarebas ourebis mihrabs curbs grabs ribs crabs rebs rebus grubs turbos cherubs yerbas