Artificial satellite and Communications satellite

Artificial satellite noun - Man-made equipment that orbits around the earth or the moon.

Communications satellite and artificial satellite are semantically related. In some cases you can use "Communications satellite" instead a noun phrase "Artificial satellite".

Communications satellite noun - An artificial satellite that relays signals back to earth; moves in a geostationary orbit.

Artificial satellite and communications satellite are semantically related. You can use "Artificial satellite" instead a noun phrase "Communications satellite".