submissionist
/səbˈmɪʃnɪst/Chiefly depreciative. Now chiefly historical
noun
A person who advocates submission or compromise; specifically (US History, in the period preceding the American Civil War) a person from the Southern states willing to relinquish sovereignty in order to remain in the Union.
- The specifically use of the term was used especially by southern secessionists..
Origin
Early 19th century; earliest use found in The New Monthly Magazine. From submission + -ist.