Close call with a whale

Front

one of a set of toothed wheels that work together to alter the relation between the speed of a driving mechanism (such as the engine of a vehicle or the crank of a bicycle)

Back

Gear

Front

jump or dive quickly and energetically.

Back

Plunge

Front

an unexpected stroke of good luck

Back

Fluke

Front

a climb or walk to the summit of a mountain or hill.

Back

Ascent

Front

acutely distressing or painful

Back

Harrowing

Front

belonging to the present time

Back

Current

Front

temporary unconsciousness or confusion caused by a blow on the head

Back

Concussion

Front

unexpectedly experience or be faced with (something difficult or hostile)

Back

Encounter

Front

a ship or large boat

Back

Vessel

Front

causing great physical or mental pain

Back

Agonizing