The USS Addams was an Excelsior class cruiser serving in Starfleet during the 24th century.
By the time of the Battle of Psellus in 2371, she was commanded by Captain Alyssa McDougal and part the First Fleet. During the battle, the Addams was stationed at Starbase 22 to react to a possible defeat of Starfleet forces by the Romulans. However, three of her type-6 shuttles and pilots were used by Commander Doleo to land a small force to reinforce the rebels during the fight. ("Armistice Part II")