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.
furor furore frore fuhrer furrier fuehrer furriery farer freer frere firer friar frier fairer fearer friary farrier fierier firrier farriery
juror furor tourer dourer sourer prior pourer mirror lurer curer cruor crore horror furore frore error aurora aurar roar purer surer terror warrior
fro fur faro four froe frow furrow furrowy furry fury