mountain vs flock

mountain and flock both are nouns.

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

As nouns, mountain and flock are synonyms defined as:

mountain and flock: (often followed by `of') a large number or amount or extent

mountain (noun)	flock (noun)
a land mass that projects well above its surroundings; higher than a hill	a group of birds
(often followed by `of') a large number or amount or extent	a group of sheep or goats
	a church congregation guided by a pastor
	an orderly crowd
	(often followed by `of') a large number or amount or extent

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