What is another word for be on back?
Pronunciation: [biː ˌɒn bˈak] (IPA) 
The phrase "be on back" refers to someone who is absent or has not returned. Various synonyms can be used to describe this state of being, such as missing, gone, absent, AWOL, absent without leave, disappeared, vanished, or lost. These words are commonly used when someone is expected to be somewhere but is not present, whether at school, work, or home. The term "on back" implies that the person is not only missing but also unreachable, not answering calls, and not responding to messages. These synonyms are important to know and use when reporting and explaining someone's absence or disappearance.
