Is “Blunder” a Scrabble word?
Yes
BLUNDER
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 Blunder
/ˈblʌn.də(ɹ)/
noun
1.A clumsy or embarrassing mistake.
2.A very bad move, usually caused by some tactical oversight.
Synonyms: blooper, boo-boo, error, faux pas, flub, fluff
verb
1.To make a clumsy or stupid mistake.
“to blunder in preparing a medical prescription”
2.To move blindly or clumsily.
3.To cause to make a mistake.