START

jump

Propel oneself airborne

• frightSudden intense fear
• joltAbrupt forceful shake
• shockViolent sudden disturbance

flinch · alarm · scare · bolt · spook · twitch · recoil · jerk

commencement

Act of starting

• onsetStarting point of something
• launchSet into motion
• outsetInitial point of something

inception · kickoff · initiation · opening · genesis · dawn · origin · departure · introduction · embarkation

handicap

Imposed competitive disadvantage

• leadDense metal, symbol Pb
• edgeBoundary or sharpness
• boostUpward push or increase

leg up · jump · advance · upper hand · priority · headway

engine

Machine producing motion

• carWheeled motor vehicle
• motorEnergy-to-motion converter
• keyLock-opening device

button · ignition · crank · turnover · battery · spark · choke · rev · idle · warm up

gun

Projectile-launching weapon

• pistolCompact one-handed firearm
• signalMessage-conveying cue
• lineContinuous mark or queue

block · sprint · whistle · running · lane · crouch · runners · countdown · mark · set

• Nuclearnuclear reactor, atomic bomb, nuclear energy, atomic bombs, uranium
• arms controlarms control, disarmament, nonproliferation, arms deals, arms reduction
• Cold War Diplomacydétente, detente, arms control, summits, SALT talks
• Global OrganizationsUnited Nations, UN, European Union, EU, NATO
• summitspeak, summit, summits, apex, pinnacle
• Cold WarBerlin Wall, Iron Curtain, arms race, Warsaw Pact, Cuban Missile Crisis