Nouns

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

Verbs

(v)codeattach a code to“Code the pieces with numbers so that you can identify them later”
(v)code, encipher, cipher, cypher, encrypt, inscribe, write in codeconvert ordinary language into code“We should encode the message for security reasons”