Synonyms of irrational

irrational

adjective

i-ˈra-sh(ə-)nəl 

as in unreasonable

not using or following good reasoning

it's irrational to think that you can continue to consume an excess of calories and not gain weight

Synonyms & Similar Words

• unreasonable
• unreasoning
• illegitimate
• unreasoned
• illogical
• misleading
• absurd
• weak
• foolish
• nonrational
• silly
• fallacious
• invalid
• weird
• inconsequential
• meaningless
• unsound
• inconsequent
• unusual
• inconsistent
• strange
• odd
• sophistical
• misguided
• specious
• insane
• sophistic
• nonsensical
• random
• asinine
• unconsidered
• surreal
• mad
• inexplicable
• preposterous
• ill-advised
• eristic
• eristical
• disordered
• disorganized
• unexplainable
• nutty
• unaccountable
• reasonless
• whacky
• senseless
• unconvincing
• wacky
• half-baked
• Kafkaesque
• peculiar
• rambling

Antonyms & Near Antonyms

• rational
• reasonable
• logical
• valid
• sound
• sensible
• wise
• sane
• justified
• sober
• reasoned
• well-founded
• enlightened
• informed
• just
• well-grounded
• certain
• plausible
• commonsense
• compelling
• clear
• persuasive
• solid
• organized
• convincing
• credible
• true
• sure
• satisfying
• cogent
• ordered
• demonstrated
• confirmed
• established
• validated
• substantiated
• corroborated

Examples of irrational in a Sentence

Recent Examples on the Web

That’s not an irrational fear: embryos are destroyed all the time in the fertility world, either purposely (perhaps because a patient no longer wishes to pay for storage, or because the embryo is unlikely to result in a healthy pregnancy) or because of human error. —Jamie Ducharme, TIME, 7 Aug. 2024

Few movies so effortlessly capture the feeling of childhood — long passages of carefree exploration and boundless imagination are punctuated by occasional bursts of existential hysteria and irrational paranoia. —Wesley Stenzel, EW.com, 11 Aug. 2024

The hope, says Conway, is that Trump will see the commercials and be provoked into irrational public behavior that would further expose his psychological unfitness. —Dan Rodricks, Baltimore Sun, 8 Aug. 2024

Is the delight over Harris a temporary phenomenon, a species of irrational exuberance? —Susan B. Glasser, The New Yorker, 25 July 2024