little terror vs rascal

little terror and rascal both are nouns.

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

As nouns, rascal is a hypernym of little terror; that is, rascal is a word with a broader meaning than little terror:

Other hypernyms of little terror include imp, monkey, rapscallion, scalawag, scallywag, scamp.

little terror (noun)	rascal (noun)
a very troublesome child	one who is playfully mischievous
	a deceitful and unreliable scoundrel