head covering vs chadar

head covering and chadar both are nouns.

Word	Noun	Adjective	Verb	Adverb
head covering	Yes	No	No	No
chadar	Yes	No	No	No

As nouns, chadar is a hyponym of head covering; that is, chadar is a word with a more specific, narrower meaning than head covering:

head covering: a garment that covers the head and face
chadar: a cloth used as a head covering (and veil and shawl) by Muslim and Hindu women

Other hyponyms of head covering include chaddar, chador, chuddar, face veil, yashmac, yashmak.

head covering (noun)	chadar (noun)
a garment that covers the head and face	a cloth used as a head covering (and veil and shawl) by Muslim and Hindu women