Is “Overshadow” a Scrabble word?
Yes
OVERSHADOW
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 Overshadow
verb
1.To obscure something by casting a shadow.
2.To dominate something and make it seem insignificant.
3.To shelter or protect.
Synonyms: dwarf, eclipse, outdo, outmatch, outshadow, outshine