Rum-pot, a word commonly used to describe a person who is foolish or eccentric, has several synonyms. One synonym is goofball, which refers to a person who behaves in a silly or comical way. Another synonym is oddball, which describes a person who is eccentric or unusual. A similar term is kook, which is often used to describe a person who is strange or crazy. Other synonyms for rum-pot include nutcase, loon, crackpot, and screwball. These words are often used in a humorous or lighthearted way, but they can also be used to describe someone who is truly mentally unstable.