Antonyms of noun extraordinariness

1 sense of extraordinariness

Sense 1
extraordinariness -- (the quality of being extraordinary and not commonly encountered)
       Antonym of ordinariness (Sense 1)
      => ordinariness, mundaneness, mundanity -- (the quality of being commonplace and ordinary)

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

1 sense of extraordinariness

Sense 1
extraordinariness -- (the quality of being extraordinary and not commonly encountered)
       => quality -- (an essential and distinguishing attribute of something or someone; "the quality of mercy is not strained"--Shakespeare)