Yes, BEATINGS is a Scrabble word!

Letter values in Scrabble US: B 3, E 1, A 1, T 1, I 1, N 1, G 2, S 1.

Is it a valid word?

BEATINGS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

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

Also: beat out, beat up, work over, wash up, tucker out.