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.
sonatas sonnets senates snots snits sinuates saints centas sounds snouts suints scents snoots sondes sundaes sennets sennits sanitise sanities sienites zenaidas sands sends sneds sonnetize santos scends snoods synods sundews
pinatas sonatas bonitas gnats antas annates anatase neats qanats nates quintas mantas neonates penates fantasy tannates pintas phantasy enates phenates phonates juntas conatus quinnats manats mantuas panadas nadas ruinates senates hyphenates centas donates yentas