i Register
In some senses, gownsman is marked as archaic. Watch for register when choosing this word.
noun
One whose professional habit is a gown, such as a divine, a lawyer, or a member of certain English universities.
The two gownsmen lowered the rigid body. It lay straight as a board, supported by no more than its head on the chair-back, and its heels on the ground.
A civilian, in distinction from a soldier.