Deputise for is a term frequently used in the workplace to refer to someone filling in or standing in for someone else who is unavailable. However, there are several synonyms for this phrase that can be used to add variety to your communication. The most common synonyms for deputise for include acting for, substitute for, fill in for, take the place of, stand in for, and cover for. Depending on the context of your communication, choosing the best synonym for deputise for can help you to convey your message more effectively and succinctly.