turban vs headgear

turban and headgear both are nouns.

Word	Noun	Adjective	Verb	Adverb
turban	Yes	No	No	No
headgear	Yes	No	No	No

As nouns, headgear is a hypernym of turban; that is, headgear is a word with a broader meaning than turban:

turban: a traditional Muslim headdress consisting of a long scarf wrapped around the head
headgear: clothing for the head

Other hypernyms of turban include headdress.

turban (noun)	headgear (noun)
a traditional Muslim headdress consisting of a long scarf wrapped around the head	clothing for the head
a small round woman's hat	stable gear consisting of any part of a harness that fits about the horse's head
	the hoist at the pithead of a mine