Is “Nebbish” a Scrabble word?
Yes
NEBBISH
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 Nebbish
/ˈnɛ.bɪʃ/
noun
1.One who is fearful and timid, especially in making decisions and plans, in discussions, debates, arguments, and confrontations, and in taking responsibility.
“Actor Rick Moranis often plays a nebbish.”