rascal vs small fry

rascal and small fry both are nouns.

Word	Noun	Adjective	Verb	Adverb
rascal	Yes	No	No	No
small fry	Yes	No	No	No

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

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

rascal (noun)	small fry (noun)
one who is playfully mischievous	someone who is small and insignificant
a deceitful and unreliable scoundrel	a young person of either sex