Is “Stair” a Scrabble word?
Yes
STAIR
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Stair
/stɛə/
noun
1.A single step in a staircase.
2.A series of steps; a staircase.
Synonyms: apples and pears