Is “Shadowboxing” a Scrabble word?
Yes
SHADOWBOXING
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 Shadowboxing
verb
1.To practice moves without an actual opponent, often in front of a mirror.
noun
1.A form of solo exercise, involving throwing punches at the air, and not at an opponent.