-racingtogetherbridletobridle;advanceatanequalpacewith;advanceshouldertoshoulder;advancinginline;goatthesamerateasothers;hold[keep]pacewith;Horsesharnessedsidebysideruntogether.;keepabreastofoneanother;keepinstep;keepupwith;runneckand[to]neck;staywith