Synonyms of 'secession'
withdrawalDictionary, break, split
the Ukraine's secession from the Soviet Union
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If someone is accused of apostasy, they are accused of abandoning their religious faith, political loyalties, or principles.
a charge of apostasy
There is some threat of a break in relations between them.
Thesaurus for secession from the Collins English Thesaurus
The secession of a region or group from the country or larger group to which it belongs is the action of formally becoming separate .