Synonyms of senselessness

1 Syllable
bs, bunk
2 Syllables
twaddle, vainness, daftness, folly, madness, rubbish, follies, claptrap, weakness
3 Syllables
idiocy, psychosis, poppycock, witlessness, lunacies, dottiness, pointlessness, mistake, wackiness, zaniness, nuttiness, goofiness, foolishness, flakiness, craziness, absurdness, carrying-on, psychoses, tommyrot, bootlessness, idiocies, nonsense, lunacy, cretinism, silliness, foolery, flapdoodle
4 Syllables
tomfoolery, insanities, insanity, insaneness, futility, psychopathy, uselessness, meaninglessness, absurdities, inanity, rigmarole, inaneness, imprudence, ludicrousness, futilities, absurdity, unwiseness, indiscretion, stupidity
5 Syllables
asininity, preposterousness, imbecility
6 Syllables
impracticality, insensibility, unreasonableness, irrationality, unprofitableness, nonsensicality
7 Syllables
inadvisability, irresponsibility