flock vs bevy

flock and bevy both are nouns.

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

As nouns, bevy is a hyponym of flock; that is, bevy is a word with a more specific, narrower meaning than flock:

flock: a group of birds
bevy: a flock of birds (especially when gathered close together on the ground)

Other hyponyms of flock include covert, covey, exaltation, gaggle, wisp, flight.

flock (noun)	bevy (noun)
a group of birds	a flock of birds (especially when gathered close together on the ground)
a group of sheep or goats	a large gathering of people of a particular type
a church congregation guided by a pastor
an orderly crowd
(often followed by `of') a large number or amount or extent

flock (verb)	bevy (verb)
come together as in a cluster or flock
move as a crowd or in a group