60 entries under adjective topic. ×

2
buoyant
2
diligent
2
industrious
2
keen(calm, indifferent)
2
lusty(weak, energetic, healthy)
1
snappy
1
agile
1
alive
1
astir
1
awake
1
bright
1
enthusiastic(excited, interested)
1
hearty(energetic, enthusiastic, aloof, unhealthy)
1
jocular
1
jolly
1
jovial
1
living
1
racy
1
speak fast(dull, slow, sluggish, lazy)
1
zealous(cool, cold, enthusiastic)
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APASmart Define. (2016). lethargic thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/lethargic/thesaurus/antonyms
ChicagoSmart Define. 2016. "lethargic thesaurus" https://smartdefine.org/lethargic/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2016, lethargic thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/lethargic/thesaurus/antonyms>.
MLASmart Define. "lethargic thesaurus" 4 January 2016. Web. 28 September 2026. <https://smartdefine.org/lethargic/thesaurus/antonyms>