Antonyms of noun heaviness

1 of 5 senses of heaviness

Sense 1
heaviness, weightiness -- (the property of being comparatively great in weight; "the heaviness of lead")
       Antonym of lightness (Sense 2)
      => lightness, weightlessness -- (the property of being comparatively small in weight; "the lightness of balsa wood")

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

5 senses of heaviness

Sense 1
heaviness, weightiness -- (the property of being comparatively great in weight; "the heaviness of lead")
       => weight -- (the vertical force exerted by a mass as a result of gravity)

Sense 2
heaviness -- (persisting sadness; "nothing lifted the heaviness of her heart after her loss")
       => sadness, unhappiness -- (emotions experienced when not in a state of well-being)

Sense 3
ponderousness, heaviness -- (an oppressive quality that is laborious and solemn and lacks grace or fluency; "a book so serious that it sometimes subsided into ponderousness"; "his lectures tend to heaviness and repetition")
       => uninterestingness -- (inability to capture or hold one's interest)

Sense 4
thickness, heaviness -- (used of a line or mark)
       => wideness, broadness -- (the property of being wide; having great width)

Sense 5
burdensomeness, heaviness, onerousness, oppressiveness -- (unwelcome burdensome difficulty)
       => difficulty, difficultness -- (the quality of being difficult; "they agreed about the difficulty of the climb")