regular, rhythmic, steady
pounding
disco, funky, hip-hop, techno, etc.
He chants his lyrics over an infectious disco beat.

drum (usually drumbeat)
heart (usually heartbeat)
hoof

clap to, dance to, sway to
They danced to the rhythmic beat of the music.

feel
She felt the beat of his heart.

hear
We heard the beat of distant drums.

count
Count four beats and then start singing.

two, three, four, etc. beats to the bar (BrE)
The piece has four beats to the bar/measure.

sb's heart misses a beat, sb's heart skips a beat (= sb feels very nervous)
As I opened the letter, my heart missed a beat.

pound, walk (both BrE)
We have two officers walking the beat after midnight.

on the beat
officers on the beat

comfortably (BrE), comprehensively (BrE), convincingly (esp. BrE), easily, handily (AmE), hands down, soundly
He beat her hands down.

consistently
a higher-rated player who consistently beat her

narrowly
He was narrowly beaten by his opponent.

at
She beat him at chess.

by
I beat her by just three points.

beat sb into second, third, etc. place
He was beaten into second place by the American.

badly, brutally, mercilessly, savagely, severely, soundly, violently
constantly, repeatedly, routinely
His stepfather repeatedly beat his mother.

with
She was beaten with a metal bar.

beat sb about the head (BrE), beat sb over the head
He had been beaten over the head with a rock.

beat sb to death
beat sb unconscious

fast, frantically, furiously, painfully, rapidly, wildly
I could feel my heart beating wildly.

loudly

thoroughly, well
Beat the mixture well, until it is light and creamy.

lightly
Add three eggs, lightly beaten.

Beat is used with these nouns as the subject:
heart, pulse, rain, wing

Beat is used with these nouns as the object:
academy, addiction, blues, butter, cancer, carpet, challenger, champion, chest, clock, competitor, cream, crime, drum, egg, expectation, fist, hand, illness, margarine, odds, opponent, recession, record, retreat, rhythm, rival, side, system, team, time, traffic, white, wife, wing