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.
snickery snicker snacker sinker snakier sneaker snigger snooker snaggier sneakier snuggery snugger sinecure snuggerie sangar
snickery knackery knacker knocker necker nicker finickier finnickier monicker monkery panickier snacker snicker donnicker