nada vs relative quantity

nada and relative quantity both are nouns.

Word	Noun	Adjective	Verb	Adverb
nada	Yes	No	No	No
relative quantity	Yes	No	No	No

As nouns, relative quantity is a hypernym of nada; that is, relative quantity is a word with a broader meaning than nada:

nada: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
relative quantity: a quantity relative to some purpose

nada (noun)	relative quantity (noun)
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential	a quantity relative to some purpose