tidy sum vs flock

tidy sum and flock both are nouns.

Word	Noun	Adjective	Verb	Adverb
tidy sum	Yes	No	No	No
flock	Yes	No	Yes	No

As nouns, tidy sum and flock are synonyms defined as:

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

tidy sum (noun)	flock (noun)
(often followed by `of') a large number or amount or extent	a group of birds
	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

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