Yes, LABORS is a Scrabble word!

Letter values in Scrabble US: L 1, A 1, B 3, O 1, R 1, S 1.

Is it a valid word?

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

a social class comprising those who do manual labor or work for wages
productive work (especially physical work done for wages)
concluding state of pregnancy; from the onset of contractions to the birth of a child
an organized attempt by workers to improve their status by united action (particularly via labor unions) or the leaders of this movement
a political party formed in Great Britain in 1900; characterized by the promotion of labor's interests and formerly the socialization of key industries
the federal department responsible for promoting the working conditions of wage earners in the United States; created in 1913
any piece of work that is undertaken or attempted

Also: working class, lying-in, labor movement, trade union movement, british labour party, labour party, department of labor, labor department.

Not playable in Scrabble US: PARTURIENCY.