Since it's codenames, I would guess some of the words on the board they were hinting at would be WW2/war/call of duty/video games related stuff like France, Ear

Since it's codenames, I would guess some of the words on the board they were hinting at would be WW2/war/call of duty/video games related stuff like France, Ear, Lag, Light, Hand, Hurt, Mud, Radio...