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.
tariffs truffes turfs torrifies terrifies draffs travois trophies triphase travoise tirrivees torrefies drives traves troves turves derives troughs
griffs tariffs sheriffs riffs rifs gruffs sherifs sharifs draffs serifs briefs griffes griefs ruffs reifs raffs shroffs