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.
rufous ruffs refuse ruffes roughs roughhouse rifs refs roughies raffs riffs roofs roves reefs reifs roughhews revues raffias reavows reifies roofies
rufous feus uveous tofus dufus doghouse devious suffuse foes foss foys fuse fuss baghouse boffos buffos bughouse effuse niveous poufs refuse roughhouse defuse diffuse doofus taphouse typhous chophouse
ruff ruffe gruff gruffy truffe