"Doest double duty" is a phrase that describes something or someone that performs two functions or tasks simultaneously. Synonyms for this phrase include "multi-functional", "versatile", "dual-purpose", and "two-in-one". Another synonym is "flexible" which implies adaptability to fulfill multiple roles. "Efficient" is a word that can also be used to describe something that does double duty as it suggests maximum productivity in terms of output. "Resourceful" is another suitable alternative to this phrase, which highlights the ability to make the most of the available resources while accomplishing multiple tasks. Whether it's a gadget, a tool, or a person, the ability to do double duty is an asset in both personal and professional settings.