1) Cipher 2) Code 3) Convert into code 4) Convert to code 5) Create a cryptogram 6) Cypher 7) Encode 8) Encrypt 9) Inscribe 10) Make hard to read 11) To encrypt 12) Translate into code 13) Use a key 14) Write 15) Write in code Found on https://www.crosswordclues.com/clue/encipher