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.
rugous rugose rugosa rugs raucous ruckus rocs rigs rags regs roux rakus raggs rocks rooks rucks ragas recuse rogues roques raggees raggies reggaes rookies
rugous gos aqueous goas agues guys goys goos vagus goes raucous hocus locus kagus magus negus bogus scouse segues souks zygose dagos teguas chegoes jouks nocuous gigues bigos rugosa rogues rugose egos focus fucous mucous fugus fugues vacuous vogues gogos leagues logos sagos segos soukous zouks dagoes dioicous togues chigoes
rug ruga rugae ergo erugo frug drug druggie druggy trug