All diurnal antonyms
di·ur·nal
D d adjective diurnal
- changing — not remaining the same; transient
adj diurnal
- variable — apt or liable to vary or change; changeable: variable weather; variable moods.
- abnormal — Someone or something that is abnormal is unusual, especially in a way that is worrying.
- unusual — not usual, common, or ordinary; uncommon in amount or degree; exceptional: an unusual sound; an unusual hobby; an unusual response.
- infrequent — happening or occurring at long intervals or rarely: infrequent visits.
- nightly — coming or occurring each night: his nightly walk to the newsstand.
- nocturnal — of or relating to the night (opposed to diurnal).
- irregular — without symmetry, even shape, formal arrangement, etc.: an irregular pattern.
- uncommon — not common; unusual; rare: an uncommon word.
- different — not alike in character or quality; distinct in nature; dissimilar: The two brothers are very different, although they are identical twins.
- rare — Réseaux Associés pour la Recherche Européenne
- temporary — an office worker hired, usually through an agency on a per diem basis, for a short period of time.