77 entries under careless topic. ×

4
fanciful(adjective, unreasonable, unpredictable, changeable)
4
fly-by-night(adjective, loose, foolish, uncertain)
4
foolish(stupid, unreasonable, fantastic, unthinking)
4
freakish(adjective, change, continue, unreasonable)
4
lubricious(adjective, smooth, lively, uncertain)
4
scatterbrained(stupid, immoral, thoughtless, unreliable)
3
frivolous(adjective, stupid, unreliable, changeable)
3
loony(foolish, stupid, unreasonable, unthinking)
2
effervescent(lively, unreasonable, unreliable, changeable)
2
loose(adjective, free, foolish, immoral)
2
stupid(foolish, unreasonable, unthinking, illogical)
2
unaccountable(immoral, thoughtless, reckless, negligent)
2
wacky(foolish, stupid, unreasonable, unthinking)
1
absurd(foolish, stupid, unreasonable, fantastic)
1
any way the wind blows(expression, unreasonable, unpredictable, changeable)
1
arbitrary(unreasonable, irregular, unreliable, changeable)
1
blowing hot and cold(expression, idiom, unreasonable, changeable)
1
contrary(adjective, uncertain, unreasonable, irregular)
1
crotchety(adjective, unreasonable, unpredictable, changeable)
1
every which way(expression, unreasonable, unpredictable, changeable)
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APASmart Define. (2016). unstable thesaurus. Retrieved September 27, 2026, from https://smartdefine.org/unstable/thesaurus/synonyms
ChicagoSmart Define. 2016. "unstable thesaurus" https://smartdefine.org/unstable/thesaurus/synonyms (accessed September 27, 2026).
HarvardSmart Define 2016, unstable thesaurus, Smart Define, viewed 27 September, 2026, <https://smartdefine.org/unstable/thesaurus/synonyms>.
MLASmart Define. "unstable thesaurus" 26 February 2016. Web. 27 September 2026. <https://smartdefine.org/unstable/thesaurus/synonyms>