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.
cease cess seas cees zoeas sycee cis zas sews syce sice saws seis sees says sass zees sues
fease cease pease ease lease tease jesse raise vase pase masse asea fesse pause base feaze zoeae reuse phase lase beaus seise tasse resee queasy resew rase yeahs hawse toeas passe paseo paise peise peace leas keas cause easy peas teas chase cheese geese liaise wrasse seas zoeas tawse case chaise chasse sheas yeas
cease causey chess chase teas cess caws fease casa case cassia cause easy cays ease cues keas leas lease peas pease cees seas tease chasse yeas