terrorist act vs IRA

terrorist act and IRA both are nouns.

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

terrorist act (noun)	IRA (noun)
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	a retirement plan that allows you to contribute a limited yearly sum toward your retirement; taxes on the interest earned in the account are deferred
	a militant organization of Irish nationalists who used terrorism and guerilla warfare in an effort to drive British forces from Northern Ireland and achieve a united independent Ireland