Synonyms of unsound

1 Syllable

daft, mad, ill, wrong, frail, weak, shrimp

2 Syllables

falser, schizoid, tippier, madder, tippy, moonstruck, flimsier, crackers, rootless, false, shelfer, ailing, untrue, rotten, chancier, truthless, shrimper, maddest, shallow, wronging, fecal, wronger, fluffed, wrongest, shoaler, specious, punker, crazed, frailer, dafter, daftest, flimsy, loco, schizzo, flawed, wanting, shaky, brainsick, whacko, weakly, faultier, wobbly, punier, puny, weakest, falsest, shakiest, frailest, chancy, unwell, riskier, shakier, morbid, half-pint, way-off, junky, faulty, risky, depthless, flubbed, glitched, snafued, weaker, infirm

3 Syllables

casuistic, damaged, off-the-wall, sophistic, aquake, ashake, fallacious, unshielded, invalid, incongruous, tottering, unbacked, lunatic, senseless, impaired, decrepit, jerrybuilt, unhealthy, perilous, hazardous, ill-founded, bad-smelling, putrified, unhinged, fragile, jerry-built, demented, reasonless, broken-down, incorrect, unstable, erroneous, mistaken, insane, diseased, pustular, rickety, imperfect, unscrewed, dangerous, deranged, anile, rattletrap, unwiser, purulent, shallower, unsteady, cooked-up, unsafe, crackbrained

4 Syllables

unreliable, irrational, jellylike, delicate, unsubstantial, defective, unreasoning, cockamamie, jerry-rigged, misfigured, unsupported, untenable, imprecise, insecure, illogical, insubstantial, overripe, unbalanced

5 Syllables

bottom-of-barrel, unretentive, undependable, inaccurate

7 Syllables

misrepresentative