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.
snoods snoots synods snots sneds sands sends snouts sounds scends sondes santos sundews sundaes snits scents saints suints zounds sennets sennits cenotes senates sonatas sonnets sanities sanitise sienites sinuates
snoods nodes nods nodus anodes bonds fonds gentoos conoids ganoids quinoids ponds snoots synods dynodes
snood snoot snooty snot snotty snout snouty synod