illogical (adj.)
- aberrant
- abroad
- adrift
- amiss
- askew
- awry
- contradictory
- corrupt
- deceptive
- defective
- delusive
- deviant
- distorted
- errant
- erring
- erroneous
- fallacious
- false
- faulty
- flawed
- heretical
- heterodox
- illusory
- inauthentic
- inconclusive
- incongruous
- inconsequent
- inconsequential
- inconsistent
- invalid
- irrational
- loose
- off
- out
- peccant
- perverse
- perverted
- reasonless
- self-contradictory
- senseless
- straying
- unauthentic
- unconnected
- unorthodox
- unproved
- unreasonable
- unscientific
- untrue
- wide
- wrong
