troop vs social unit

troop and social unit both are nouns.

Word	Noun	Adjective	Verb	Adverb
troop	Yes	No	Yes	No
social unit	Yes	No	No	No

As nouns, social unit is a hypernym of troop; that is, social unit is a word with a broader meaning than troop:

Other hypernyms of troop include unit.

troop (noun)	social unit (noun)
a group of soldiers	an organization regarded as part of a larger social group
an orderly crowd
a unit of Girl or Boy Scouts
a cavalry unit corresponding to an infantry company

troop (verb)	social unit (verb)
move or march as if in a crowd
march in a procession in a public place