zero vs cipher

zero and cipher both are nouns.

Word	Noun	Adjective	Verb	Adverb
zero	Yes	Yes	Yes	No
cipher	Yes	No	Yes	No

As nouns, zero and cipher are synonyms defined as:

zero and cipher: a mathematical element that when added to another number yields the same number

Other synonyms of zero include 0, cypher, nought.

As nouns, zero and cipher are synonyms defined as:

zero and cipher: a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential

Other synonyms of zero include aught, cypher, goose egg, nada, naught, nil, nix, nothing, null, zilch, zip, zippo.

zero (noun)	cipher (noun)
the sight setting that will cause a projectile to hit the center of the target with no wind blowing	a secret method of writing
the point on a scale from which positive or negative numerical quantities can be measured	a message written in a secret code
a mathematical element that when added to another number yields the same number	a person of no influence
a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential	a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential
	a mathematical element that when added to another number yields the same number

zero (adjective)	cipher (adjective)
of or relating to the null set (a set with no members)
indicating the absence of any or all units under consideration
having no measurable or otherwise determinable value
indicating an initial point or origin

zero (verb)	cipher (verb)
adjust (as by firing under test conditions) the zero of (a gun)	make a mathematical calculation or computation
adjust (an instrument or device) to zero value	convert ordinary language into code