Synonyms of insubstantial

1 Syllable

slight, scant, paled, frail, thin, weak, poor

2 Syllables

airy, feebler, paper, unreal, slighter, flimsier, doughier, slightest, doughy, rootless, false, floaty, gauzy, palest, feeblest, idle, slender, filmy, transient, junker, tenuous, cardboard, ghostly, frailer, flimsy, ghostlier, stalky, weakly, strengthless, aerial, puny, unsound, meager, slimmer, paler, weakest, frailest, slimmest, weightless, scrimpy, junky, petty, feeble, weaker, infirm

3 Syllables

fanciful, bodiless, jesuitic, meaningless, paper-thin, unshielded, unfleshly, unbacked, decrepit, jerrybuilt, rinkydink, slenderer, light-footed, floatable, unbodied, fragile, jerry-built, ungrounded, papered, vampiric, doubletalk, papering, featherweight, doublespeak, lightfooted, eidolic, storybook, niggardly, unmeaning, rinky-dink, ethereal, fly-by-night, papery, wafer-thin

4 Syllables

illusory, suprahuman, elusive, incorporeal, nonmaterial, nonphysical, unphysical, intangible, unsubstantial, chimerical, gossamery, discarnate, uncorporal, jerry-rigged, imagined, spiritlike, ephemeral, immaterial, unpurposed, elusory, nonexistent, impalpable, disposable

5 Syllables

supermundane, supranatural, supramundane, metaphysical, discorporate, imponderable, inadequate