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.
grocer grocery grouser grosser grazer crozer greaser crozier grazier gorsier crosser crosier coercer grassier carouser greasier curiouser curser cursor creaser cursory cruiser coarser courser crazier crasser kreuzer caresser creasier
grocer farceur tracer proser pricer mercery mercer grocery crozer coercer forcer fiercer farcer racer bracero bracer rooser ricer racier piercer pricier sorcery tracery
croci grace gross grouse grows rockeries rockers rockrose