holy terror vs brat

holy terror and brat both are nouns.

Word	Noun	Adjective	Verb	Adverb
holy terror	Yes	No	No	No
brat	Yes	No	No	No

As nouns, holy terror and brat are synonyms defined as:

Other synonyms of holy terror include little terror, terror.

holy terror (noun)	brat (noun)
a very troublesome child	a very troublesome child
	a small pork sausage