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.
senarii scenario senary senor snare sonar senora senior seiner scenery saner sneer sinner sneery sooner sunray synura zonary sunnier
senarii denarii scenario denari