hijab vs usage

hijab and usage both are nouns.

Word	Noun	Adjective	Verb	Adverb
hijab	Yes	No	No	No
usage	Yes	No	No	No

As nouns, usage is a hypernym of hijab; that is, usage is a word with a broader meaning than hijab:

hijab: the custom in some Islamic societies of women dressing modestly outside the home
usage: accepted or habitual practice

Other hypernyms of hijab include custom, usance.

hijab (noun)	usage (noun)
the custom in some Islamic societies of women dressing modestly outside the home	the act of using
a headscarf worn by Muslim women; conceals the hair and neck and usually has a face veil that covers the face	accepted or habitual practice
	the customary manner in which a language (or a form of a language) is spoken or written