beat vs dead

beat and dead both are nouns.

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

As adjectives, beat and dead are synonyms defined as:

Other synonyms of beat include all in, bushed.

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

beat (adjective)	dead (adjective)
very tired	no longer having or seeming to have or expecting to have life
	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

beat (verb)	dead (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

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