existential operator vs existential quantifier

existential operator and existential quantifier both are nouns.

Word	Noun	Adjective	Verb	Adverb
existential operator	Yes	No	No	No
existential quantifier	Yes	No	No	No

As nouns, existential operator and existential quantifier are synonyms defined as:

existential operator and existential quantifier: a logical quantifier of a proposition that asserts the existence of at least one thing for which the proposition is true

existential operator (noun)	existential quantifier (noun)
a logical quantifier of a proposition that asserts the existence of at least one thing for which the proposition is true	a logical quantifier of a proposition that asserts the existence of at least one thing for which the proposition is true