ill-founded
I
adjective
apocryphal, baseless, empty, erroneous, fallacious, false, fanciful, groundless, inaccurate, incorrect, insubstantial, sophistic, sophistical, suppositional, trumped up, unbased, unconfirmed, unfounded, ungrounded, unsubstantial, unsupportable, unsupported, unsustainable, untenable, unwarranted, without basis, without foundation, without sound basis, without substance
II
index
baseless, improper, unsound (fallacious)
Burton's Legal Thesaurus.
William C. Burton.
2006