impoundment vs seizure

impoundment and seizure both are nouns.

Word	Noun	Adjective	Verb	Adverb
impoundment	Yes	No	No	No
seizure	Yes	No	No	No

As nouns, seizure is a hypernym of impoundment; that is, seizure is a word with a broader meaning than impoundment:

impoundment: placing private property in the custody of an officer of the law
seizure: the taking possession of something by legal process

impoundment (noun)	seizure (noun)
placing private property in the custody of an officer of the law	the taking possession of something by legal process
	the act of forcibly dispossessing an owner of property
	the act of taking of a person by force
	a sudden occurrence (or recurrence) of a disease