Synonyms|141Antonyms|43|Broader|1Narrower|2Related|62

28 entries under noun topic. ×

3
wakefulness
2
energy
2
insomnia
2
sleeplessness
1
alertness
1
animation
1
drive
1
intensity
1
liveliness
1
power
1
vigor
1
vitality
0
activity
0
force
0
forcefulness
0
health
0
life
0
nimbleness
0
potency
0
punch
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APASmart Define. (2015). sleepiness thesaurus. Retrieved September 30, 2026, from https://smartdefine.org/sleepiness/thesaurus/antonyms
ChicagoSmart Define. 2015. "sleepiness thesaurus" https://smartdefine.org/sleepiness/thesaurus/antonyms (accessed September 30, 2026).
HarvardSmart Define 2015, sleepiness thesaurus, Smart Define, viewed 30 September, 2026, <https://smartdefine.org/sleepiness/thesaurus/antonyms>.
MLASmart Define. "sleepiness thesaurus" 10 April 2015. Web. 30 September 2026. <https://smartdefine.org/sleepiness/thesaurus/antonyms>