nobody vs small fry

nobody and small fry both are nouns.

Word	Noun	Adjective	Verb	Adverb
nobody	Yes	No	No	No
small fry	Yes	No	No	No

As nouns, small fry is a hyponym of nobody; that is, small fry is a word with a more specific, narrower meaning than nobody:

Other hyponyms of nobody include pip-squeak, squirt, jackanapes, lightweight, whippersnapper.

nobody (noun)	small fry (noun)
a person of no influence	someone who is small and insignificant
	a young person of either sex