Is “Whomso” a Scrabble word?
Yes
WHOMSO
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 Whomso
pronoun
1.Whichever person, whomever