Synonyms|92Antonyms|21|Broader|0Narrower|0Related|65
7
nocturnal
2
aperiodic
2
nightly(adjective, circadian)
1
night
1
nighttime
0
erratic
0
imperishable
0
infrequent
0
interrupted
0
irregular
0
late
0
monthly
0
nonperiodic
0
occasional
0
serotinous
0
spasmodic
0
spastic
0
sporadic
0
weekly
0
yearly
<12>
For more, visit Diurnal on Power Thesaurus
11 years ago|747 views|share |citing 
APASmart Define. (2015). diurnal thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/diurnal/thesaurus/antonyms
ChicagoSmart Define. 2015. "diurnal thesaurus" https://smartdefine.org/diurnal/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2015, diurnal thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/diurnal/thesaurus/antonyms>.
MLASmart Define. "diurnal thesaurus" 14 April 2015. Web. 30 September 2026. <https://smartdefine.org/diurnal/thesaurus/antonyms>