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.
vicars vicarious vigors vigours fiacres vagaries vaqueros vigoroso vigorous vagarious fakers fakirs faqirs fakeers faquirs figures fuckers voguers
cars vicars sowcars scars soucars picaras guars acarus acres agars curs gaurs scaurs cigars saguaros saggars eggars recurs muggars scares gars crus squares sugars decares dekares chukars shikaris picaros ecrus lycras lucres fiacres cris cors cougars hegaris makars cares carrs jaguars micros macros carse mucors coarse beggars seggars nacres sucres daycares decors uakaris chukkars shikars