Lieut. is a shortened version of the word lieutenant, which refers to a commissioned officer in the armed forces or a position of authority in a business or government organization. Some synonyms for the word lieut. include lieutenant, second in command, deputy, assistant, adjutant, and aide-de-camp. These words all represent authority and leadership, highlighting the importance of someone who holds the title of lieut. in their respective field. Whether in the military or in a civilian organization, a lieut. plays a crucial role in the hierarchy and serves as a vital support system for their superior.