terrorisation vs terrorist act

terrorisation and terrorist act both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorisation	Yes	No	No	No
terrorist act	Yes	No	No	No

terrorisation (noun)	terrorist act (noun)
the act of inspiring with fear	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
an act of terrorism