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.
scree screw sucre score scare screwy scarey secure scry cicoree scoriae scar sacra scaur scour scary scarry scoria scurry seeker sicker soucar sowcar square squire sucker sacker suckier
scree decree chickaree core fiacre scare pugree puggree puggaree pugaree ocreae ocrea lucre nacre secure care acre gree cure crew cicoree score screw sucre decare agree daycare degree shikaree