illogical
I
adjective
absurdus, contradictory, contrary to reason, contrary to the rules of logic, fallacious, faulty, groundless, inconsistent, indefensible, irrational, logically unsound, mistaken, nonscientific, paralogistic, self-contradictory, sophistic, sophistical, unfounded, ungrounded, unscientific, unsound, unsustainable, untenable, without basis, without foundation
associated concepts: arbitrary and capricious
II
index
arbitrary, baseless, disordered, disproportionate, erroneous, fatuous, ill-judged, improper, inapposite, incongruous, inconsistent, inept (inappropriate), irrational, misadvised, nonsubstantial (not sturdy), sophistic, unfounded, unreasonable, unsound (fallacious), untenable
Burton's Legal Thesaurus.
William C. Burton.
2006