Is “Gnashes” a Scrabble word?
Yes
GNASHES
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 Gnashes
/ˈnæʃɪz/
verb
1.To grind (one's teeth) in pain or in anger.
“gnashing your teeth”
2.To grind between the teeth.
“The dog was gnashing a carpet”
3.To run away.