rascal vs brat

rascal and brat both are nouns.

Word	Noun	Adjective	Verb	Adverb
rascal	Yes	No	No	No
brat	Yes	No	No	No

As nouns, brat is a hyponym of rascal; that is, brat is a word with a more specific, narrower meaning than rascal:

Other hyponyms of rascal include holy terror, little terror, terror.

rascal (noun)	brat (noun)
one who is playfully mischievous	a very troublesome child
a deceitful and unreliable scoundrel	a small pork sausage