headgear vs kaffiyeh

headgear and kaffiyeh both are nouns.

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

As nouns, kaffiyeh is a hyponym of headgear; that is, kaffiyeh is a word with a more specific, narrower meaning than headgear:

headgear: clothing for the head
kaffiyeh: an Arab headdress consisting of a square piece of cloth folded into a triangle and fastened over the crown by an agal

headgear (noun)	kaffiyeh (noun)
clothing for the head	an Arab headdress consisting of a square piece of cloth folded into a triangle and fastened over the crown by an agal
stable gear consisting of any part of a harness that fits about the horse's head
the hoist at the pithead of a mine