Is “Squark” a Scrabble word?
Yes
SQUARK
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 Squark
/skwɑːk/
noun
1.A hypothetical supersymmetric counterpart to a quark, having a spin of zero instead of one-half.