act of terrorism vs RIRA

act of terrorism and RIRA both are nouns.

Word	Noun	Adjective	Verb	Adverb
act of terrorism	Yes	No	No	No
RIRA	Yes	No	No	No

act of terrorism (noun)	RIRA (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 radical terrorist group that broke away in 1997 when the mainstream Provisional IRA proposed a cease-fire; has continued terrorist activities in opposition to any peace agreement