"Be reaving" is an archaic phrase that means to rob or plunder. In modern usage, there are several synonyms that can be employed to convey the same meaning. Some common synonyms for "be reaving" include "loot", "pillage", "plunder", "steal", "rob", "ravage", and "devastate". Each of these words can be used to describe the act of taking something by force or without permission. They can be used in various contexts, such as describing burglaries, thefts, or invasions. Using synonyms to create variation and diversity in language can help elevate the writing and convey the intended meaning and tone more clearly.