The word "un-naturalnesses" refers to things that are not natural or do not conform to the laws of nature. Some of the antonyms for this word include "naturalness," "authenticity," "genuineness," and "inherentness." These words suggest a state of being real, original, and in accordance with natural laws. Other antonyms for "un-naturalnesses" include "normalcy," "usualness," and "commonness," which indicate that something is typical or expected. Synonyms for "naturalness" or "authenticity" can be used to describe anything that is not artificial or fabricated, such as organic foods, natural materials, or a person's true personality.