9
freakish(adjective, unusual, careless, unstable, unreasonable)
9
optional(adjective, chance, possible, uninformed, random)
8
overbearing(adjective, insolence, dictatorial)
8
discretionary(adjective, open, free, chance, opinion)
8
frivolous(adjective, chance, changeable, uninformed, indecisive)
8
magisterial(adjective, insolence, dictatorial)
8
supreme(authority, full, absolute, main, chief)
7
fickle(adjective, careless, cold, hot, unstable)
7
haphazard(adjective, organization, plan, chance, casual)
7
inconsistent(adjective, foolish, stupid, chance, irregular)
7
irrational(adjective, foolish, stupid, chance, senseless)
7
subjective(adjective, chance, opinion, surprise, whimsical)
7
summary(adjective, point, absolute, swift, instant)
7
uncertain(adjective, unusual, irregular, unreliable, changeable)
7
unconstrained
7
unrestrained
6
chance(adjective, careless, casual, uninformed, random)
6
changeable(adjective, irregular, unpredictable, unreliable, variable)
6
monocratic(adjective, full, absolute, over, politics)
6
oppressive(adjective, severity)
11 years ago|18k views|share |citing 
APASmart Define. (2015). arbitrary thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/arbitrary/thesaurus/synonyms
ChicagoSmart Define. 2015. "arbitrary thesaurus" https://smartdefine.org/arbitrary/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, arbitrary thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/arbitrary/thesaurus/synonyms>.
MLASmart Define. "arbitrary thesaurus" 13 April 2015. Web. 21 September 2026. <https://smartdefine.org/arbitrary/thesaurus/synonyms>