What is a synonym for "unnaturalness"?

Common synonyms include: aberration, abnormality, affectation, airs, anomaly, artfulness.

Unnaturalness

noun

noun ·Rare ·Advanced level

Noun

1
The state of being unnatural. countable, uncountable
"However, the American sensibility was less caught up in Angst and unnaturalness; it rejected the antibeauty implication of the Europeans."
2
the quality of being unnatural or not based on natural principles wordnet

"However, the American sensibility was less caught up in Angst and unnaturalness; it rejected the antibeauty implication of the Europeans."

From Middle English unnaturelnesse, equivalent to unnatural + -ness.