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.
calices calces culices calyces coalesces calesas cullises calluses calloses coulisses callouses gallicize clozes closes glaces galliasses clauses classes classis coleuses galluses glassies glossies colessees gallowses galleasses colzas glacis glazes glozes glasses glosses
helices slices culices chalices cilices pollices malices cylices calices polices palsies falces places solaces challises valises realizes tallises calces luces halluces glaces laces cullises bullaces calyces relaces plaices dualizes falsies realises policies palaces sluices shoelaces