acceleration actuate advance advance against advance upon afterburner aggressiveness animate assault atomic power bang bear bear down upon bear upon bearing best part better part body boost bowl buck bulk bull bulldoze bump bump against bunt burden butt butt against cast charge chuck clap clout compel compulsion core counterattack cram crowd cut dash dig drive drive on driving force elbow electric power electropower embed energy enterprise essence exhaust feint fire flank fling force force upon forward fuel gas generality get-up-and-go getaway ginger gist give an impetus give momentum goad gravamen head home thrust horsepower hurl hurtle hustle hydraulic power hydroelectric power impale impel impellent impelling force impetus impose on impose upon impulse impulsion incentive incite incitement infiltrate initiative irresistible force jab jam jet power jet propulsion jog joggle jolt jostle kick launch an attack line of flight liquid oxygen lunge main body major part majority manpower march against march upon mass meat moment momentum most motivate motive power mount an attack move nuclear power nudge open an offensive pass pedal pep pepper pickup pierce pile drive piss and vinegar piston power pith pizzazz plank plop plump plunge plunk plurality poke pole poop power press press on press upon pressure prod propel propellant propelling propelment propulsion propulsion charge pulsion punch purport push pushing put put in motion quickening ram ram down rattle reaction propulsion rocket power rocket propulsion roll row run run against sense set agoing set going set in motion shake short shoulder shove shoving shunt sink slap snap solar power speedup spunk stab starch steam power step-up stick stress strike substance sweep sweep along swing tamp thermonuclear power throw thrust upon toss treadle troll trundle upshot urge urge on urge upon verve vim water power whip on zing zip