beat vs flutter

beat and flutter both are nouns.

Word	Noun	Adjective	Verb	Adverb
beat	Yes	Yes	Yes	No
flutter	Yes	No	Yes	No

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

Other hyponyms of beat include pulsate, pulse, throb, palpitate, thrash, flap.

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

Other hyponyms of beat include bate, clap.

beat (noun)	flutter (noun)
the act of beating to windward; sailing as close as possible to the direction from which the wind is blowing	the act of moving back and forth
a stroke or blow	the motion made by flapping up and down
a regular rate of repetition	abnormally rapid beating of the auricles of the heart (especially in a regular rhythm); can result in heart block
the basic rhythmic unit in a piece of music	a disorderly outburst or tumult
(prosody) the accent in a metrical foot of verse
the rhythmic contraction and expansion of the arteries with each beat of the heart
the sound of stroke or blow
a regular route for a sentry or policeman
a member of the beat generation; a nonconformist in dress and behavior
a single pulsation of an oscillation produced by adding two waves of different frequencies; has a frequency equal to the difference between the two oscillations

beat (adjective)	flutter (adjective)
very tired

beat (verb)	flutter (verb)
wear out completely	wink briefly
be a mystery or bewildering to	beat rapidly
come out better in a competition, race, or conflict	move back and forth very rapidly
beat through cleverness and wit	move along rapidly and lightly; skim or dart
hit repeatedly	flap the wings rapidly or fly with flapping movements
give a beating to; subject to a beating, either as a punishment or as an act of aggression
stir vigorously
strike (a part of one's own body) repeatedly, as in great emotion or in accompaniment to music
strike (water or bushes) repeatedly to rouse animals for hunting
shape by beating
make by pounding or trampling
produce a rhythm by striking repeatedly
move rhythmically
sail with much tacking or with difficulty
move with a flapping motion
indicate by beating, as with the fingers or drumsticks
move with a thrashing motion
move with or as if with a regular alternating motion
make a rhythmic sound
make a sound like a clock or a timer
glare or strike with great intensity
avoid paying
be superior