Is “Subvocalize” a Scrabble word?
Yes
SUBVOCALIZE
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 Subvocalize
verb
1.To form (words or statements) in thought and express them inwardly without uttering them aloud.