Yes, BREATHINGS is a Scrabble word!

Letter values in Scrabble US: B 3, R 1, E 1, A 1, T 1, H 4, I 1, N 1, G 2, S 1.

Is it a valid word?

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

the bodily process of inhalation and exhalation; the process of taking in oxygen from inhaled air and releasing carbon dioxide by exhalation

draw air into, and expel out of, the lungs
be alive
impart as if by breathing
allow the passage of air through
utter or tell
manifest or evince
take a short break from one's activities in order to relax
reach full flavor by absorbing air and being let to stand after having been uncorked
expel (gases or odors)

Also: external respiration, take a breath, catch one's breath, take a breather, pass off.