21
unreliable(adjective, clear, bad, strong, weak)
12
undependable(adjective, bad, weak, responsible, irresponsible)
11
not good
11
disloyal
8
untrustworthy(adjective, bad, open, weak, honest)
6
fickle(adjective, cold, hot, steady, vacillating)
5
dishonest(adjective, good, bad, open, weak)
5
shameful
5
ever-changing
5
hypocritical(adjective, deceitful, pretending)
5
liminal
5
unsound(adjective, strong, sound, well)
4
erratic(adjective, calm, unpredictable, consistent, wandering)
4
faithless(adjective, faithful, disloyal)
4
capricious(reasonable, predictable)
4
changeable(calm, constant)
4
corrupt(adjective, bad, weak, undependable)
4
irresponsible(adjective, bad, weak, careless, reckless)
4
non-punctual
4
perfidious
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APASmart Define. (2016). reliable thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/reliable/thesaurus/antonyms
ChicagoSmart Define. 2016. "reliable thesaurus" https://smartdefine.org/reliable/thesaurus/antonyms (accessed September 21, 2026).
HarvardSmart Define 2016, reliable thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/reliable/thesaurus/antonyms>.
MLASmart Define. "reliable thesaurus" 3 March 2016. Web. 21 September 2026. <https://smartdefine.org/reliable/thesaurus/antonyms>