Is “Stack” a Scrabble word?
Yes
STACK
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 Stack
/stæk/
noun
1.(heading) A pile.
2.A smokestack.
3.(heading) In computing.
verb
1.To arrange in a stack, or to add to an existing stack.
“Please stack those chairs in the corner.”
2.To arrange the cards in a deck in a particular manner.
“This is the third hand in a row where you've drawn four of a kind. Someone is stacking the deck!”
3.To take all the money another player currently has on the table.
“I won Jill's last $100 this hand; I stacked her!”
Synonyms: build up, stack up, gerrymander, smash, wreck