Antonyms for the word "prettinesses" can be ugliness, unattractiveness, homeliness, plainness, or unsightliness. These terms reflect a contrast to the quality of being attractive, pleasing, or beautiful. Whereas prettinesses denote something bright, lovely, and admirable, its antonyms indicate something dull, unappealing, or repulsive. While all people have their unique features and can be attractive in their own way, society has its standards of beauty. Therefore, these contrasting terms are used more often in a comparative sense than to describe the absolute quality of something's appearance. In summary, the antonyms of prettinesses describe a lack of beauty, charm, or elegance.