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.
cricks cracks crocks crucks caracks crocs corks carks cariocas carracks crocus crakes creeks crooks croaks creaks carcase carcass croquis curacaos curacoas grigs crags groks kirks cargos quarks quirks cargoes garigues karaokes
wricks cricks tricks hayricks pricks derricks ricks bricks reracks barracks darics mirks arracks quirks heroics torics frocks tracks wrecks rocks carracks rucks crucks drecks triacs recks shrieks wracks racks brocks caracks lyrics ruckus kirks cracks dirks crocks birks traiks troikas chirks irks myricas hayracks ericas tricksy trocks trucks shirks trikes shrikes
crick crickey carioca crack cracky crikey croc crock cruck rickrack ricrac