sequester vs sequestration

sequester is not a noun while sequestration is a noun.

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

sequester (noun)	sequestration (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

sequester (verb)	sequestration (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