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.
sinuates senates sienites suints saints snouts sundaes sonatas sanities snots snits sneds scientize scents snoots sondes santos sennets sonnets cenotes sennits sundews sanitise sanitize sands sends scends snoods sounds synods
sinuates phonates donates annates antes enates hyphenates phenates nates manatees quants mantes minutes neonates penates ruinates senates tannates