Is “Holder” a Scrabble word?
Yes
HOLDER
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 Holder
/ˈhəʊldə/
noun
1.A thing that holds.
“Put your umbrella in the umbrella holder.”
2.A person who temporarily or permanently possesses something.
“He's been an account holder with us since 2004.”
3.One who is employed in the hold of a vessel.