baseless

• POS: Adjective
• HYPHEN: base=less

CIDE DICTIONARY

baseless, a. 

 Without a base; having no foundation or support.  Shak.  [1913 Webster]

OXFORD DICTIONARY

baseless, adj. unfounded, groundless.

Derivative

baselessly adv. baselessness n.

THESAURUS

baseless

bottomless, built on sand, empty, false, gratuitous, groundless, idle, ill-founded, indefensible, needless, not well-founded, pointless, reasonless, senseless, unbased, uncalled-for, unfounded, ungrounded, unjustifiable, unnecessary, unneeded, unsolid, unsupportable, unsupported, unsustainable, unsustained, untenable, unwarranted, vain, without basis, without foundation, wrong

ROGET THESAURUS

baseless

Inexistence

N inexistence, nonexistence, nonsubsistence, nonentity, nil, negativeness, nullity, nihility, nihilism, tabula rasa, blank, abeyance, absence, no such thing, nonbeing, nothingness, oblivion, annihilation, extinction, extinguishment, extirpation, Nirvana, obliteration, inexistent, nonexistent, negative, blank, missing, omitted, absent, insubstantial, shadowy, spectral, visionary, unreal, potential, virtual, baseless, in nubibus, unsubstantial, vain, unborn, uncreated, unbegotten, unconceived, unproduced, unmade, perished, annihilated extinct, exhausted, gone, lost, vanished, departed, gone with the wind, defunct, fabulous, ideal, supposititious &c, negatively, virtually, non ens.

Unsubstantiality

N unsubstantiality, insubstantiality, nothingness, nihility, no degree, no part, no quantity, no thing, nothing, naught, nil, nullity, zero, cipher, no one, nobody, never a one, ne'er a one, no such thing, none in the world, nothing whatever, nothing at all, nothing on earth, not a particle, all talk, moonshine, stuff and nonsense, matter of no importance, matter of no consequence, thing of naught, man of straw, John Doe and Richard Roe, faggot voter, nominis umbra, nonentity, flash in the pan, vox et praeterea nihil, shadow, phantom, dream, ignis fatuus, such stuff as dreams are made of, air, thin air, vapor, bubble, baseless fabric of a vision, mockery, hollowness, blank, void, inanity, fool's paradise, unsubstantial, baseless, groundless, ungrounded, without foundation, having no foundation, visionary, immaterial, spectral, dreamy, shadowy, ethereal, airy, cloud built, cloud formed, gossamery, illusory, insubstantial, unreal, vacant, vacuous, empty, eviscerated, blank, hollow, nominal, null, inane, there's nothing in it, an ocean of dreams without a sound.