insubstantial
I
adjective
airy, baseless, bodiless, chimerical, ephemeral, fanciful, feeble, flimsy, fragile, frail, groundless, hallucinatory, illusive, illusory, imaginary, imagined, immaterial, impalpable, inadequate, inconsequential, inconsiderable, incorporeal, infirm, insignificant, lacking firmness, lacking substance, lame, made poorly, modest, nonexistent, notional, of no consequence, paltry, petty, picayune, poor, powerless, scant, slender, slight, slim, spectral, superficial, tenuous, thin, trifling, trivial, unbased, unfirm, unfounded, ungrounded, unimportant, unreal, unsolid, unsound, unsubstantial, unsupportable, unsustainable, untenable, vague, visionary, weak, without basis, without foundation, without plausibility, without reality, wobbly, worthless
II
index
circumstantial, collateral (immaterial), deficient, delusive, ill-founded, illusory, immaterial, inadequate, inappreciable, inconsiderable, insipid, intangible, minor, negligible, nonsubstantial (not sufficient), nugatory, null (insignificant), perfunctory, remote (small), superficial, unfounded, unsound (fallacious), void (invalid)
Burton's Legal Thesaurus.
William C. Burton.
2006