Antonyms of noun timeliness

1 of 2 senses of timeliness

Sense 1
seasonableness, timeliness -- (being at the right time)
       Antonym of untimeliness (Sense 1)
      => unseasonableness, untimeliness -- (being at an inappropriate time)

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

2 senses of timeliness

Sense 1
seasonableness, timeliness -- (being at the right time)
       => timing -- (the time when something happens)

Sense 2
opportuneness, patness, timeliness -- (timely convenience)
       => convenience -- (the quality of being useful and convenient; "they offered the convenience of an installment plan")