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.
orison orcin orcein
garrison warison prison grison orison arisen greisen rerisen raisin reason resown risen person frisson horizon persona arson coercion treason parson whoreson
ors oars ores orrice orris ours