kryptonim

He gave his code name and she put him on hold.

The code name was easy enough for him to remember.

He still knew the team only by their code names.

"Then you just give me your code name, and we're on our way out of here."

The men in the group were known to one another by code names.

It was, however, kept as a code name by this man.

"Is that the best you could dream up for a code name?"

Q. And did you have a code name for yourself?

The fact that I didn't use my code name was a further warning.

Many of the code names have yet to be identified.