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.
gneisses nesses gneissose gnoses noises newsies noses nisus nooses nieces niseis noesis gnosis nouses nauseas kneesies nauseous nazis
hisses sisses misses cuisses disses kisses wisses pisses gneisses issues quasses misuse lassies missies fesses liaises missus fosses vises biases bosses cusses gessoes cissies gausses bossies isseis loesses guesses busses noises daises chesses chasses wussies missis sises tusses tosses tassies dosses esses dassies nesses mosses sissies jesses sassies mises asses meioses lasses hussies sasses messes gasses assess rises tussehs guises mioses hoises reissues pussies lassoes fusses mousses hissies wrasses poises peises lessees wises raises passes posses bises josses cesses musses pusses possess gussies reassess poussies losses basses biasses masses seises susses daisies dieses disuse tasses tissues wusses chaises chausses yesses