little terror vs holy terror

little terror and holy terror both are nouns.

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

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

Other synonyms of little terror include brat, terror.

little terror (noun)	holy terror (noun)
a very troublesome child	a very troublesome child