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.
roughed wrought roved ruffed roofed raved refed rived right righty wright reaved reefed refute reffed reeved reived refeed revote revved riffed righto raphide reified
coughed laughed roughed soughed sughed toughed bighead jughead neighed nighed sighed weighed