code vs cypher

code and cypher both are nouns.

Word	Noun	Adjective	Verb	Adverb
code	Yes	No	Yes	No
cypher	Yes	No	Yes	No

As nouns, cypher is a hyponym of code; that is, cypher is a word with a more specific, narrower meaning than code:

code: a coding system used for transmitting messages requiring brevity or secrecy
cypher: a secret method of writing

As verbs, code and cypher are synonyms defined as:

Other synonyms of code include cipher, encipher, encrypt, inscribe, write in code.

code (noun)	cypher (noun)
a coding system used for transmitting messages requiring brevity or secrecy	a secret method of writing
a set of rules or principles or laws (especially written ones)	a message written in a secret code
(computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions	a person of no influence
a series of letters, numbers or symbols assigned to something for the purpose of classification or identification	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

code (verb)	cypher (verb)
convert ordinary language into code	make a mathematical calculation or computation
attach a code to	convert ordinary language into code