sky marshal vs terrorist act

sky marshal and terrorist act both are nouns.

Word	Noun	Adjective	Verb	Adverb
sky marshal	Yes	No	No	No
terrorist act	Yes	No	No	No

sky marshal (noun)	terrorist act (noun)
a person trained by the government in hijacking and terrorist tactics who (for security reasons) is a passenger aboard an airline flight	the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear