irrational (n.)
- aliquot
- cardinal
- contradictory
- crazy
- decimal
- differential
- even
- exponential
- extreme
- extremist
- fanatic
- finite
- haggard
- imaginary
- impossible
- infinite
- integral
- invalid
- loco
- lunatic
- mad
- manic
- mental
- negative
- numeral
- numerary
- odd
- off
- ordinal
- pair
- positive
- possible
- prime
- psycho
- queer
- radical
- rational
- real
- reciprocal
- sick
- surd
- wandering
irrational (adj.)
- abnormal
- algorithmic
- aliquot
- bigoted
- brainless
- brainsick
- cardinal
- contradictory
- crackbrained
- cracked
- crazed
- crazy
- daft
- decimal
- demented
- deranged
- differential
- digital
- disoriented
- distraught
- even
- exponential
- extravagant
- extreme
- extremist
- fallacious
- fanatic
- faulty
- figural
- figurative
- finite
- flawed
- flighty
- foolish
- fractional
- haggard
- headless
- ignorant
- ill-advised
- ill-considered
- ill-judged
- illogical
- imaginary
- impolitic
- impossible
- imprudent
- inadvisable
- inauthentic
- inconclusive
- incongruous
- inconsequent
- inconsequential
- inconsiderate
- inconsistent
- indiscreet
- inept
- inexpedient
- infinite
- injudicious
- inordinate
- insane
- insensate
- integral
- invalid
- loco
- logarithmic
- loose
- lunatic
- mad
- maddened
- manic
- mazed
- mental
- mindless
- misguided
- myopic
- negative
- nonrational
- numeral
- numerary
- numeric
- odd
- off
- ordinal
- overenthusiastic
- overzealous
- perfervid
- positive
- possible
- prime
- queer
- rabid
- radical
- rational
- real
- reasonless
- reciprocal
- reckless
- self-contradictory
- senseless
- shortsighted
- sick
- sophistic
- strange
- surd
- thoughtless
- touched
- transcendental
- unadvised
- unauthentic
- unbalanced
- unconnected
- unconsidered
- undiscerning
- unhinged
- unintelligent
- unreasonable
- unreasoning
- unreflective
- unscientific
- unseeing
- unsettled
- unsound
- untalented
- unthinking
- unthoughtful
- unwise
- wandering
- wild-eyed
- witless
