writ of certiorari vs writ

writ of certiorari and writ both are nouns.

Word	Noun	Adjective	Verb	Adverb
writ of certiorari	Yes	No	No	No
writ	Yes	No	No	No

As nouns, writ is a hypernym of writ of certiorari; that is, writ is a word with a broader meaning than writ of certiorari:

writ of certiorari: a common law writ issued by a superior court to one of inferior jurisdiction demanding the record of a particular case
writ: (law) a legal document issued by a court or judicial officer

Other hypernyms of writ of certiorari include judicial writ.

writ of certiorari (noun)	writ (noun)
a common law writ issued by a superior court to one of inferior jurisdiction demanding the record of a particular case	(law) a legal document issued by a court or judicial officer