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.
ficus focus fucus ficoes fiques fucous figs fugs fecks fucks fugus fucose fugues fix vacuous fags faux fogs vacs vigs vugs
ficus cues mucus micas mics cuss ecus licks fucous fucus dicks focus sicks ticks ruckus wicks recuse chicks pics chics picas haikus hicks sics mucous locus micks quicks kicks laics caucus hoicks guaiacs hocus wricks dioicous ricks tics raucous chicas picks chicos nicks yoicks