flock vs hatful

flock and hatful both are nouns.

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

As nouns, flock and hatful are synonyms defined as:

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

flock (noun)	hatful (noun)
a group of birds	as many or as much as a hat will hold
a group of sheep or goats	(often followed by `of') a large number or amount or extent
a church congregation guided by a pastor
an orderly crowd
(often followed by `of') a large number or amount or extent

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