Yes, HUMORS is a Scrabble word!

Letter values in Scrabble US: H 4, U 1, M 3, O 1, R 1, S 1.

Is it a valid word?

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

a message whose ingenuity or verbal skill or incongruity has the power to evoke laughter
the trait of appreciating (and being able to express) the humorous
a characteristic (habitual or relatively temporary) state of feeling
the quality of being funny
(Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state
the liquid parts of the body

Also: sense of humor, sense of humour, liquid body substance, bodily fluid, body fluid.