Is “Stumper” a Scrabble word?
Yes
STUMPER
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 Stumper
noun
1.One who stumps, or speaks, or orates, as a politician.
“He's not yet well known, but he's a good stumper.”
2.A difficult puzzle or problem.
“Global warming is a real stumper.”
3.A boastful person.