Antonyms of adj nightly

1 sense of nightly

Sense 1
nightly -- (happening every night; "nightly television now goes on until 3:00 or 4:00 a.m.")

INDIRECT (VIA periodic) -> aperiodic, nonperiodic -- (not recurring at regular intervals)

Similarity of adj nightly

1 sense of nightly

Sense 1
nightly -- (happening every night; "nightly television now goes on until 3:00 or 4:00 a.m.")
       => periodic (vs. aperiodic), periodical -- (happening or recurring at regular intervals; "the periodic appearance of the seventeen-year locust")

Synonyms of adv nightly

1 sense of nightly

Sense 1
nightly, every night -- (at the end of each day; "she checks on her roses nightly")