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.
sonnets sennets sondes sonnetize sonatas sennits sneds snits snots snouts suints scents snoots sounds saints senates sundaes sundews sienites sinuates sanities cents sands sends santos scends snoods synods
bannets rennets jennets bennets punnets sonnets gannets sennets bonnets linnets nets genets quinnats lunets minuets nonets neats netts sennits newts tenets
sonnet sennet sinned sonde sunned