Antonyms of noun niceness

1 of 3 senses of niceness

Sense 2
niceness -- (the quality of nice)
       Antonym of nastiness (Sense 3)
      => nastiness -- (the quality of being unpleasant; "I flinched at the nastiness of his wound")

Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun niceness

3 senses of niceness

Sense 1
politeness, niceness -- (a courteous manner that respects accepted social usage)
       => courtesy, good manners -- (a courteous manner)

Sense 2
niceness -- (the quality of nice)
       => pleasantness, sweetness -- (the quality of giving pleasure; "he was charmed by the sweetness of her manner"; "the pleasantness of a cool breeze on a hot summer day")

Sense 3
subtlety, niceness -- (the quality of being difficult to detect or analyze; "you had to admire the subtlety of the distinctions he drew")
       => difficulty, difficultness -- (the quality of being difficult; "they agreed about the difficulty of the climb")