Poobah is an informal and humorous term used to describe someone who holds a high rank or position in a particular group or organization. Although there aren't many synonyms that directly define poobah, there are many words available that can be used to describe someone who holds a lofty position such as chief, leader, head honcho, top dog, big wig, boss, authority figure, captain, commander, conductor, director, governor, superintendent, or supervisor. Each synonym carries its unique connotation, and its usage is influenced by context. Unlike poobah, which may be perceived as a joke, synonyms such as leader, head or chief carry a more serious tone.