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.
seise seis seize sis sews sues seas sees sycee sissy seesaw xis cis sos cess soys sows sass sizy size sice says saws syce sous suss
peise seise vise fesse fease noise pease poise reis hoise rise seis geese cease seize tease chaise resew reuse bise paise cuisse lease leis liaise mise gneiss nisei guise jesse raise resee ease deice wise cheese
seis seise sei sis leis peise reis reissue seas sees seesaw seize sews sissy sues shes