court order vs judicial writ

court order and judicial writ both are nouns.

Word	Noun	Adjective	Verb	Adverb
court order	Yes	No	No	No
judicial writ	Yes	No	No	No

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

court order: a writ issued by a court of law requiring a person to do something or to refrain from doing something
judicial writ: (law) a legal document issued by a court or judicial officer

Other hypernyms of court order include writ.

court order (noun)	judicial writ (noun)
a writ issued by a court of law requiring a person to do something or to refrain from doing something	(law) a legal document issued by a court or judicial officer