rascal vs nestling

rascal and nestling both are nouns.

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

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

Other hypernyms of rascal include child, fry, kid, minor, nipper, shaver, small fry, tiddler, tike, tyke, youngster.

rascal (noun)	nestling (noun)
one who is playfully mischievous	young bird not yet fledged
a deceitful and unreliable scoundrel	a young person of either sex