Bye bye and Bye-bye

Bye-bye and bye bye are semantically related. in departure topic. In some cases you can use "Bye-bye" instead the phrase "Bye bye" as a noun or a interjection, when it comes to topics like goodbye, farewell statement, have a nice trip.

Bye-bye noun - A farewell remark.

Bye bye and bye-bye are semantically related. You can use "Bye bye" instead the phrase "Bye-bye" as a noun or a interjection.