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.
farcer farceur forcer fiercer frizer freezer friseur frizzer furzier foreseer frizzier frouzier frowsier frowzier
farcer forcer coercer fiercer piercer mercer grocer racier courser pricier terser sorcery hoarser verser mercery tracery nurser tracer coarser bracer curser grocery bracero racer purser dorser pricer ricer parser farceur worser
farce farci farcie farcy faeries fairies fairs fares faros farrows fears fiars force afars