THESAURUS
insubstantial
adulterated, airy, asomatous, astral, attenuate, attenuated, bodiless, boyish, brittle, capricious, changeable, chimerical, corruptible, cut, dangerous, decarnate, decarnated, deciduous, decrepit, defalcation, deficiency, deficit, delicate, desultory, diaphanous, dilute, diluted, discarnate, disembodied, dying, ephemeral, ethereal, evanescent, extramundane, fading, false, fancied, fanciful, fantastic, feeble, fickle, fine, fine-drawn, finespun, fleeting, flimsy, flitting, fly-by-night, flying, fragile, frail, fugacious, fugitive, gaseous, gauzy, ghostly, girlish, gossamer, gracile, hallucinatory, illusive, illusory, imaginary, imagined, immaterial, impalpable, impermanent, impetuous, imponderable, impulsive, inadequacy, inconclusive, inconstant, incorporate, incorporeal, infirm, insecure, insignificant, insufficiency, intangible, lack, lacy, light, metaphysical, misty, momentary, mortal, mutable, nondurable, nonmaterial, nonpermanent, nonphysical, nonsubstantial, occult, otherworldly, paltry, papery, passing, paucity, perilous, perishable, phantasmal, phantom, poor, poverty, precarious, provisional, psychic, puny, rare, rarefied, risky, scant, scantiness, scarceness, shadowy, shaky, shifting, shifty, short-lived, shortage, slender, slenderish, slight, slight-made, slim, slimmish, slinky, slippery, small, spiritual, subtile, subtle, supernatural, svelte, sylphlike, temporal, temporary, tentative, tenuous, thin, thin-bodied, thin-set, thin-spun, thinned, thinned-out, thinnish, threadlike, ticklish, transient, transitive, transitory, transmundane, treacherous, uncompact, uncompressed, unconcrete, undependable, underage, undurable, unearthly, unembodied, unenduring, unextended, unfaithworthy, unfleshly, unphysical, unproved, unreal, unreliable, unrigorous, unsolid, unsound, unstable, unsteadfast, unsteady, unsubstanced, unsubstantial, unsure, unsustained, untrustworthy, unworldly, vague, vaporous, visionary, volatile, wasp-waisted, watered, watered-down, watery, weak, weightless, willowy, windy, wiredrawn, wispy
ROGET THESAURUS
insubstantial
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.
Weakness
N
weakness, debility, atony, relaxation, languor, enervation, impotence, infirmity, effeminacy, feminality, fragility, flaccidity, inactivity, anaemia, bloodlessness, deficiency of blood, poverty of blood, declension of strength, loss of strength, failure of strength, delicacy, invalidation, decrepitude, asthenia, adynamy, cachexy, cachexia, sprain, strain, reed, thread, rope of sand, house of cards, softling, weakling, infant, youth, weak, feeble, debile, impotent, relaxed, unnerved sapless, strengthless, powerless, weakly, unstrung, flaccid, adynamic, asthenic, nervous, soft, effeminate, feminate, womanly, frail, fragile, shattery, flimsy, unsubstantial,
insubstantial, gimcrack, gingerbread, rickety, creaky, creaking, cranky, craichy, drooping, tottering, broken, lame, withered, shattered, shaken, crazy, shaky, palsied, decrepit, languid, poor, infirm, faint, faintish, sickly, dull, slack, evanid, spent, short-winded, effete, weather-beaten, decayed, rotten, worn, seedy, languishing, wasted, washy, laid low, pulled down, the worse for wear, unstrengthened, unsupported, unaided, unassisted, aidless, defenseless, cantilevered (support), on its last legs, weak as a child, weak as a baby, weak as a chicken, weak as a cat, weak as a rat, weak as water, weak as water gruel, weak as gingerbread, weak as milk and water, colorless, non sum qualis eram.