write in code vs code

write in code is not a noun while code is a noun.

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

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

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

write in code (noun)	code (noun)
	a coding system used for transmitting messages requiring brevity or secrecy
	a set of rules or principles or laws (especially written ones)
	(computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions
	a series of letters, numbers or symbols assigned to something for the purpose of classification or identification

write in code (verb)	code (verb)
convert ordinary language into code	convert ordinary language into code
	attach a code to