pip-squeak vs nonentity

pip-squeak and nonentity both are nouns.

Word	Noun	Adjective	Verb	Adverb
pip-squeak	Yes	No	No	No
nonentity	Yes	No	No	No

As nouns, nonentity is a hypernym of pip-squeak; that is, nonentity is a word with a broader meaning than pip-squeak:

Other hypernyms of pip-squeak include cipher, cypher, nobody.

pip-squeak (noun)	nonentity (noun)
someone who is small and insignificant	a person of no influence
	the state of not existing