cadre vs terrorist cell

cadre and terrorist cell both are nouns.

Word	Noun	Adjective	Verb	Adverb
cadre	Yes	No	No	No
terrorist cell	Yes	No	No	No

As nouns, terrorist cell is a hyponym of cadre; that is, terrorist cell is a word with a more specific, narrower meaning than cadre:

cadre: a small unit serving as part of or as the nucleus of a larger political movement
terrorist cell: a cell of terrorists (usually 3 to 5 members)

Other hyponyms of cadre include sleeper cell, radical cell.

cadre (noun)	terrorist cell (noun)
a nucleus of military personnel capable of expansion	a cell of terrorists (usually 3 to 5 members)
a small unit serving as part of or as the nucleus of a larger political movement