40 entries under adjective topic. ×

24
irresponsible(careless, reckless)
14
untrustworthy(open, right, honest, innocent)
6
unaccountable(explicable, explainable)
6
goofy
5
crazy(calm, sound, strange)
4
reckless(thought, reserved, cautious, deed)
3
unreliable(clear, strong, true, trustworthy)
2
careless
1
blameless(responsible, guilty)
1
clear(doubtful, ambiguous, filled, guilty)
1
dependent(importance, valuable, duty, reliable)
1
immature
1
immune
1
innocent
1
flighty(fickle, irresponsible)
1
fly-by-night(unreliable, shady)
1
foolish(sound, wise)
1
free
1
stupid(sharp, intelligent, irresponsible)
1
thoughtless(reasonable, prudent)
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APASmart Define. (2015). responsible thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/responsible/thesaurus/antonyms
ChicagoSmart Define. 2015. "responsible thesaurus" https://smartdefine.org/responsible/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, responsible thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/responsible/thesaurus/antonyms>.
MLASmart Define. "responsible thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/responsible/thesaurus/antonyms>