The term 'Walkie-Talkie Word' is a phrase used to describe a type of communication device that allows two people to communicate with each other OVER a short distance. The crossword solutions for this term are 'OVER' (4 letters) and 'ROGER' (5 letters). 'OVER' is typically used to indicate that one person has finished speaking and the other person can now respond, while 'ROGER' is used to indicate that the message has been received and understood.