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.
rocs rocks recs racks rucks recks ricks rooks wracks rugose rogues ruckus wricks recuse wrecks rugosa rugous roques rookies raucous rickeys rags regs roux rigs rugs ragas raggs rakes rakis rakus recce reeks rykes