flock vs troop

flock and troop both are nouns.

Word	Noun	Adjective	Verb	Adverb
flock	Yes	No	Yes	No
troop	Yes	No	Yes	No

As nouns, flock and troop are synonyms defined as:

flock (noun)	troop (noun)
a group of birds	a group of soldiers
a group of sheep or goats	an orderly crowd
a church congregation guided by a pastor	a unit of Girl or Boy Scouts
an orderly crowd	a cavalry unit corresponding to an infantry company
(often followed by `of') a large number or amount or extent

flock (verb)	troop (verb)
come together as in a cluster or flock	move or march as if in a crowd
move as a crowd or in a group	march in a procession in a public place