ETA vs terrorist act

ETA and terrorist act both are nouns.

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

ETA (noun)	terrorist act (noun)
a terrorist organization organized in 1959 by student activists who were dissatisfied with the moderate nationalism of the traditional Basque party; want to create an independent homeland in Spain's western Pyrenees	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