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

1 sense of insomniac

Sense 1
insomniac, sleepless person -- (someone who cannot sleep)
       => sick person, diseased person, sufferer -- (a person suffering from an illness)

Antonyms of adj insomniac

1 sense of insomniac

Sense 1
insomniac, sleepless, watchful -- (experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare)

INDIRECT (VIA awake) -> asleep -- (in a state of sleep; "were all asleep when the phone rang"; "fell asleep at the wheel")

Similarity of adj insomniac

1 sense of insomniac

Sense 1
insomniac, sleepless, watchful -- (experiencing or accompanied by sleeplessness; "insomniac old people"; "insomniac nights"; "lay sleepless all night"; "twenty watchful, weary, tedious nights"- Shakespeare)
       => awake (predicate) (vs. asleep) -- (not in a state of sleep; completely conscious; "lay awake thinking about his new job"; "still not fully awake")