Adjective /(noun)
Savage ;fierce.
The state or quality of being fierce.
Ferocious / ferocity
A flesh eating animal.
Flesh eating.
Carnivore / carnivores / carnivorous
To understand.
The act of understanding; the ability to understand.
Comprehend / comprehension
Very large; like a giant in size.
gigantic
2. No longer active.
Extinct
1. A person from whom one is descended.
2. An early kind of animal from which later ones have developed; a forerunner.
ancestor / ancestors
1. To save; to keep from harm; to protect.
2. To keep from rotting or spoiling.
Preserve
Choice, something that is available as a choice.
Left to choice.
Option / Optional
A long journey by see or in space.
To make a journey by se or in space.
Voyage / voyaged
Easy to see and understand; obvious, clear.
Evident
A loud outburst.
gale / gales
To break off.
To cut in two.
Sever
A feeling or expression of great joy.
Very happy.
Jubilation / jubilant
To calculate or direct the movement of a ship or aircraft.
The science or practice of navigating
navigate / navigation / navigated
A longing for a certain time in the past.
Having feelings of nostalgia
Nostalgia / nostalgic
1. The path over which something moves.
2. A way of acting or behaving.
3. A subject or set of subjects to be studied.
Course
To bring back into use or fashion.
Revive
The apparent line in the distance where the sky meets the sea or land.
Going straight across from side to side.
Horizon / horizontal
To lose hope.
A total lack of hope.
Despair / despaired
Not exactly, but closer enough to be reasonable correct.
Approximate
The place to which something or someone is going.
Destination
To make or become worse.
Deteriorate
1. Able to give a correct reading or measurement.
2. Without mistakes or errors in facts.
accurate
To leave; to go away from a place.
The act of leaving.
Depart / departure