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ORP Vocabulary Puzzle

Across
It deals with the motion of air and the way it interacts with objects in motion, such as airplanes.
To carry on a battle or war.
A device in which a nuclear chain reaction is created and controlled.
A material used in war for weapons and ammunitions.
The beginning or start of something.
Down
Capable of possessing a nucleus, capable of undergoing fission.
A system of social organization in which all social and economic activity is controlled by a single political party.
Transparently thin.
Not using nuclear weapons.
To attack with bombs.
To achieve or complete successfully.
Used or adapted for setting property on fire.
A well fortified place or fortress.
A jelly-like substance used in fire bombs.
Very great size or proportions.