dead vs beat

dead and beat both are nouns.

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

As adjectives, dead and beat are synonyms defined as:

Other synonyms of dead include all in, bushed.

dead (noun)	beat (noun)
people who are no longer living	the act of beating to windward; sailing as close as possible to the direction from which the wind is blowing
a time when coldness (or some other quality associated with death) is intense	a stroke or blow
	a regular rate of repetition
	the basic rhythmic unit in a piece of music
	(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

dead (adjective)	beat (adjective)
no longer having or seeming to have or expecting to have life	very tired
not showing characteristics of life especially the capacity to sustain life; no longer exerting force or having energy or heat
the complete stoppage of an action
not surviving in active use
physically inactive
devoid of activity
lacking resilience or bounce
out of use or operation because of a fault or breakdown
devoid of physical sensation; numb
(followed by `to') not showing human feeling or sensitivity; unresponsive
no longer having force or relevance
unerringly accurate
not circulating or flowing
very tired
drained of electric charge; discharged
not yielding a return
lacking acoustic resonance

dead (verb)	beat (verb)
	wear out completely
	be a mystery or bewildering to
	come out better in a competition, race, or conflict
	beat through cleverness and wit
	hit repeatedly
	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

dead (adverb)	beat (adverb)
completely and without qualification; used informally as intensifiers
quickly and without warning; happening unexpectedly; on impulse; without premeditation