Is “Squarest” a Scrabble word?
Yes
SQUAREST
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 Squarest
adjective
1.Shaped like a square (the polygon).
2.Forming a right angle, especially at right angles with the mast or the keel, and parallel to the horizon; said of the yards of a square-rigged vessel when they are so braced.
“a square corner”
3.Of numbers formed by multiplying two equal numbers.
“9 is a square number.”
Synonyms: above board, on the level, on the square, on the up and up, straight, bourgeois