noun
air base
A military or sometimes civilian base for aircraft operations.
その航空基地には戦闘機が配備されている。
Fighter jets are deployed at that air base.
空軍基地 specifically refers to an air force base, while 航空基地 is a broader term that can include naval air stations or civilian airfields used for aviation.
Compound of 航空 (aviation) and 基地 (base).