air

aircraft

antenna

anti

armed

army

astronomical

astronomy

attack

ballistic

base

broadcast

building

business

combat

communication

complex

contact

cosmic

cosmos

defence

destroy

digital

discover

discovery

dish

electromagnetic

electronic

exploration

explosion

facility

fight

fire

forces

galaxy

human

information

launcher

locator

man

media

military

missile

moon

network

night

nuclear

observation

observatory

progress

protection

radar

radio

receiver

research

rocket

satellite

science

scientific

scientists

searching

security

signal

sky

space

star

station

sunset

system

technology

telescope

tower

truck

vehicle

war

warfare

warhead

weapon