What does "screwiness" mean?

The property of being screwy. Insanity, craziness, eccentricity.

What is a synonym for "screwiness"?

Common synonyms include: buffoonery, eccentricity, fatuity, folly, foolery, frivolity.

noun

noun ·Rare ·Advanced level

Noun

1
The property of being screwy. Insanity, craziness, eccentricity. uncountable
"He's screwy. I hope his screwiness isn't catching."

"He's screwy. I hope his screwiness isn't catching."

From screwy + -ness.