Here's what rhymes with optarg.
morgue outargue reorg Words that almost rhyme with optarg
dark park bark pork torque barque porque dork mark spark fork stark cork shark lark hark marque stork debark nark narc embark quark tidemark remark patriarch watermark uncork paperbark disembark matriarch oligarch meadowlark reembark fingermark dog bog jog jag log fog hog blog cog wog frog clog grog smog flog underdog agog slog befog snog sprog defog dialogue catalogue analog analogue epilogue pedagogue prolog epilog pedagog pettifog monologue demagogue monolog unclog demagog quahaug synagogue travelogue synagog travelog