sequestration vs sequester

sequestration is a noun but sequester is not a noun.

Word	Noun	Adjective	Verb	Adverb
sequestration	Yes	No	No	No
sequester	No	No	Yes	No

sequestration (noun)	sequester (noun)
the act of segregating or sequestering
seizing property that belongs to someone else and holding it until profits pay the demand for which it was seized
a writ that authorizes the seizure of property
the action of forming a chelate or other stable compound with an ion or atom or molecule so that it is no longer available for reactions

sequestration (verb)	sequester (verb)
	keep away from others
	set apart from others
	undergo sequestration by forming a stable compound with an ion
	take temporary possession of as a security, by legal authority
	requisition forcibly, as of enemy property