airport terminal vs air terminal

airport terminal and air terminal both are nouns.

Word	Noun	Adjective	Verb	Adverb
airport terminal	Yes	No	No	No
air terminal	Yes	No	No	No

As nouns, airport terminal and air terminal are synonyms defined as:

airport terminal and air terminal: a terminal that serves air travelers or air freight

airport terminal (noun)	air terminal (noun)
a terminal that serves air travelers or air freight	a terminal that serves air travelers or air freight