terrorist act vs radical cell

terrorist act and radical cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
terrorist act	Yes	No	No	No
radical cell	Yes	No	No	No

terrorist act (noun)	radical cell (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 cell of terrorists (usually 3 to 5 members)