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Synonyms for unreasonable
adj not logical or sensible- absurd
- arbitrary
- biased
- contradictory
- foolish
- illogical
- inconsistent
- irrational
- preposterous
- senseless
- silly
- stupid
- wrong
- all wet
- capricious
- erratic
- fallacious
- far-fetched
- full of hot air
- headstrong
- incoherent
- incongruous
- inconsequential
- invalid
- loose
- mad
- nonsensical
- off the wall
- opinionated
- quirky
- reasonless
- thoughtless
- unreasoned
- vacant
Antonyms for unreasonable
- circumspect
- consistent
- correct
- intelligent
- logical
- rational
- reasonable
- right
- sensible
- serious
- wise
- cheap
- economical
- low
- plain
- practical
- pragmatic
- realistic
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.
arbitrary
adjective. whimsical, chance
capricious
adjective. given to sudden behavior change
- any way the wind blows
- arbitrary
- blowing hot and cold
- careless
- changeful
- contrary
- crotchety
- effervescent
- erratic
- every which way
- fanciful
- fickle
- fitful
- flaky
- flighty
- freakish
- gaga
- helter-skelter
- humorsome
- impulsive
- inconstant
- kinky
- lubricious
- mercurial
- moody
- mutable
- notional
- odd
- picky
- punchy
- queer
- quirky
- temperamental
- ticklish
- unpredictable
- unreasonable
- unstable
- up and down
- vagarious
- variable
- volatile
- wayward
- whimsical
- yo-yo
counterintuitive
adjective. contrary to common sense
delirious
adjective. mentally imbalanced
- aberrant
- bewildered
- confused
- crazed
- crazy
- demented
- deranged
- deviant
- deviate
- disarranged
- disordered
- distracted
- disturbed
- flipped
- flipped out
- hallucinatory
- incoherent
- insane
- irrational
- lightheaded
- lunatic
- mad
- maniac
- maniacal
- manic
- off one's head
- out of one's head
- out of one's skull
- rambling
- raving
- unhinged
- unreasonable
- unsettled
- wandering
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.