Wiktionary
antiseparatist
n. One who opposes separatism.
Usage examples of "antiseparatist".
And he was right to step back when they began fighting among themselves-the separatists battling the antiseparatists.
And a Basque antiseparatist-a leading activist-was killed by Basque separatists while he was a patient in the hospital.
The bulk of the Basques are staunch antiseparatists who want to remain part of Spain.
The owners were avowed antiseparatist Basques who had endured gun attacks and a firebombing.