Synonyms for Sequester (same or very similar meaning)
WordNet sense 1 (take temporary possession of as a security, by legal authority):
confiscate, impound, seize, attachWordNet sense 2 (keep away from others):
seclude, withdraw, sequestrateWordNet sense 3 (set apart from others):
isolate, isolate, keep apartFrom the ODE community, based on WordNetadd/edit