cypher vs write in code

cypher is a noun but write in code is not a noun.

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

As verbs, cypher and write in code are synonyms defined as:

Other synonyms of cypher include cipher, code, encipher, encrypt, inscribe.

cypher (noun)	write in code (noun)
a secret method of writing
a message written in a secret code
a person of no influence
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

cypher (verb)	write in code (verb)
make a mathematical calculation or computation	convert ordinary language into code
convert ordinary language into code