Is “Shudder” a Scrabble word?
Yes
SHUDDER
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 Shudder
/ˈʃʌdə/
noun
1.A shivering tremor, often from fear or horror.
2.A moment of almost pleasurable fear; a frisson.
Synonyms: jiggle, quake, quiver, rumble, quiver, shiver
verb
1.To shake nervously, often from fear or horror.
2.To vibrate jerkily.
Synonyms: flutter, jiggle, shake, wiggle, palpitate, quake