Yes, codes is a Scrabble word!

Verb

1. Attach a code to

2. Convert ordinary language into code

3. Fool or hoax

4. Harass with persistent criticism or carping

Noun

1. A set of rules or principles or laws (especially written ones)

2. A coding system used for transmitting messages requiring brevity or secrecy

3. (computer science) the symbolic arrangement of data or instructions in a computer program or the set of such instructions