seizure vs apprehension

seizure and apprehension both are nouns.

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

As nouns, apprehension is a hyponym of seizure; that is, apprehension is a word with a more specific, narrower meaning than seizure:

seizure (noun)	apprehension (noun)
the taking possession of something by legal process	the act of apprehending (especially apprehending a criminal)
the act of forcibly dispossessing an owner of property	the cognitive condition of someone who understands
the act of taking of a person by force	painful expectation
a sudden occurrence (or recurrence) of a disease	fearful expectation or anticipation