writ of error vs judicial writ

writ of error and judicial writ both are nouns.

Word	Noun	Adjective	Verb	Adverb
writ of error	Yes	No	No	No
judicial writ	Yes	No	No	No

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

writ of error: a judicial writ from an appellate court ordering the court of record to produce the records of trial
judicial writ: (law) a legal document issued by a court or judicial officer

Other hypernyms of writ of error include writ.

writ of error (noun)	judicial writ (noun)
a judicial writ from an appellate court ordering the court of record to produce the records of trial	(law) a legal document issued by a court or judicial officer