Antonyms of noun unavailability

1 sense of unavailability

Sense 1
inaccessibility, unavailability -- (the quality of not being available when needed)
       Antonym of availability (Sense 1)
      => handiness, accessibility, availability, availableness -- (the quality of being at hand when needed)

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

1 sense of unavailability

Sense 1
inaccessibility, unavailability -- (the quality of not being available when needed)
       => inconvenience -- (the quality of not being useful or convenient)