flock vs bunch

flock and bunch both are nouns.

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

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

Other hyponyms of flock include huddle, huddle together, bunch together, bunch up.

flock (noun)	bunch (noun)
a group of birds	a grouping of a number of similar things
a group of sheep or goats	an informal body of friends
a church congregation guided by a pastor	any collection in its entirety
an orderly crowd
(often followed by `of') a large number or amount or extent

flock (verb)	bunch (verb)
come together as in a cluster or flock	gather or cause to gather into a cluster
move as a crowd or in a group	form into a bunch