fall vs flag

fall and flag both are nouns.

Word	Noun	Adjective	Verb	Adverb
fall	Yes	No	Yes	No
flag	Yes	No	Yes	No

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

fall (noun)	flag (noun)
a sudden drop from an upright position	a conspicuously marked or shaped tail
the act of surrendering (usually under agreed conditions)	emblem usually consisting of a rectangular piece of cloth of distinctive design
a lapse into sin; a loss of innocence or of chastity	stratified stone that splits into pieces suitable as paving stones
a sudden sharp decrease in some quantity	flagpole used to mark the position of the hole on a golf green
a free and rapid descent by the force of gravity	a rectangular piece of fabric used as a signalling device
a sudden decline in strength or number or importance	a listing printed in all issues of a newspaper or magazine (usually on the editorial page) that gives the name of the publication and the names of the editorial staff, etc.
when a wrestler's shoulders are forced to the mat	plants with sword-shaped leaves and erect stalks bearing bright-colored flowers composed of three petals and three drooping sepals
a movement downward
a downward slope or bend
the season when the leaves fall from the trees
the time of day immediately following sunset

fall (verb)	flag (verb)
occur at a specified time or place	provide with a flag
decrease in size, extent, or range	become less intense
pass suddenly and passively into a state of body or mind	communicate or signal with a flag
be born, used chiefly of lambs	decorate with flags
come out; issue	droop, sink, or settle from or as if from pressure or loss of tautness
assume a disappointed or sad expression
begin vigorously
come as if by falling
be cast down
go as if by falling
fall or flow in a certain way
move downward and lower, but not necessarily all the way
move in a specified direction
descend in free fall under the influence of gravity
slope downward
drop oneself to a lower or less erect position
lose an upright position suddenly
to be given by assignment or distribution
be captured
fall to somebody by assignment or lot; passed
come into the possession of
to be given by right or inheritance
be inherited by
lose office or power
yield to temptation or sin
suffer defeat, failure, or ruin
lose one's chastity
die, as in battle or in a hunt
be due
come under, be classified or included
touch or seem as if touching visually or audibly
fall from clouds