List of vacuous synonyms and vacuous related words.
airy, asinine, awkward, bare, barren, bland, blank, blankminded, bleached, callow, calm, catchpenny, characterless, clear, devoid, dumb, empty, empty-headed, empty-minded, empty-pated, empty-skulled, existless, fatuous, featureless, flimsy, foolish, fribble, fribbling, frivolous, frothy, futile, gauche, green, groping, hollow, idle, ignorant, inane, incogitant, inexperienced, innocent, insipid, jejune, know-nothing, lacking, light, minus, missing, naive, negative, nescient, nirvanic, nonexistent, nugacious, nugatory, null, null and void, oblivious, otiose, passive, quietistic, rattlebrained, rattleheaded, raw, relaxed, scatterbrained, shallow, silly, simple, slender, slight, strange to, superficial, tentative, thoughtfree, thoughtless, tranquil, trifling, trite, trivial, unacquainted, unapprized, uncomprehending, unconversant, unenlightened, unexisting, unfamiliar, unideaed, unilluminated, uninformed, uninitiated, unintellectual, unintelligent, unknowing, unoccupied, unposted, unreasoning, unrelieved, unripe, unsure, unthinking, unversed, vacant, vain, vapid, void, white, windy, with nothing inside, without being, without content