turret vs gun turret

turret and gun turret both are nouns.

Word	Noun	Adjective	Verb	Adverb
turret	Yes	No	No	No
gun turret	Yes	No	No	No

As nouns, turret and gun turret are synonyms defined as:

turret and gun turret: a self-contained weapons platform housing guns and capable of rotation

Other synonyms of turret include gun enclosure.

turret (noun)	gun turret (noun)
a small tower extending above a building	a self-contained weapons platform housing guns and capable of rotation
a self-contained weapons platform housing guns and capable of rotation