kidnapping vs seizure

kidnapping and seizure both are nouns.

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

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

kidnapping: (law) the unlawful act of capturing and carrying away a person against their will and holding them in false imprisonment
seizure: the act of taking of a person by force

Other hypernyms of kidnapping include capture.

kidnapping (noun)	seizure (noun)
(law) the unlawful act of capturing and carrying away a person against their will and holding them in false imprisonment	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