Is “Regrew” a Scrabble word?
Yes
REGREW
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 Regrew
verb
1.To grow again a part that has been lost, shed or destroyed.
“Deciduous trees regrow their leaves every year.”