Airfield and Air base

Airfield noun - A place from which aircraft operate that usually has paved runways and a terminal.

Air base and airfield are semantically related. in runway for aircraft topic. In some cases you can use "Air base" instead a noun "Airfield", when it comes to topics like airplane landing area.

Air base noun - A base for military aircraft.

Airfield and air base are semantically related. You can use "Airfield" instead a noun phrase "Air base".