Yes, WHEELCHAIR is a Scrabble word!

Letter values in Scrabble US: W 4, H 4, E 1, E 1, L 1, C 3, H 4, A 1, I 1, R 1.

Is it a valid word?

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

a movable chair mounted on large wheels; for invalids or those who cannot walk; frequently propelled by the occupant