Here's what rhymes with knockknock.
knock mock mach talk rock shock walk hoc lock chalk cock dock hawk loc doc balk doch loch manioc smock sock chock hock pock bock gawk jock wok calk caulk choc stock block clock flock bloc stalk frock unlock proc crock macaque schlock moonwalk shlock tomahawk squawk antiknock hammerlock shoptalk windsock backtalk ballcock interlock aftershock hollyhock restock poppycock laughingstock overstock leafstalk sparrowhawk electroshock Words that almost rhyme with knockknock
dog log fog bog hog cog jog smog jag wog snog analog frog analogue monologue blog clog grog flog agog slog monolog underdog befog unclog sprog defog dialogue catalogue synagogue epilogue demagogue prolog epilog synagog demagog quahaug pedagogue travelogue pedagog travelog pettifog mark mosque marque manque nark narc dark park bark fork pork torque cork shark lark barque hark porque honk dork bonk conk wank wonk remark spark stark embark quark stork bronc uncork watermark debark tidemark fingermark matriarch oligarch meadowlark reembark patriarch disembark paperbark