Synonyms for Daft:

adj.

deranged (adjective)
nutty.
foolish (adjective)
lunatic, loopy.
gaga (adjective)
around the bend.
insane (adjective)
balmy, brainsick, crackers, demented, deranged, fruity, loco, moonstruck, bananas.
screwy (adjective)
screwy.
senseless (adjective)
asinine.
stupid; crazy (adjective)
asinine, bonkers, cracked, crackers, demented, deranged, foolish, insane, lunatic, mad, nuts, nutty, ridiculous, screwy, touched, unbalanced, unsound, wacky, Daffy.
touched (adjective)
not all there.

n.

childish, laughable, ludicrous, over-the-top, not in your right mind/not right in the head. brainsick, cuckoo, demented, disordered, distraught, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, non compos mentis, of unsound mind, off, sane, screwy, touched, unbalanced, unsound, Daffy, bananas, not all there, crazy as a loon, mad as a hatter, nutty as a fruitcake, sick in the head, stark raving mad. daft (noun)
around the bend, balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, dotty, fruity, haywire, insane, kookie, kooky, loco, loony, loopy, nuts, nutty, round the bend, wacky, whacky.
silly (noun)
asinine, foolish, ridiculous.

Other synonyms:

brainsick, mentally ill, Daffy, bananas. demented, distraught, maniacal, non compos mentis, screwy, touched, unbalanced. disordered, moonstruck, unsound. mad. off. Other relevant words:
asinine, brainsick, childish, cuckoo, demented, deranged, disordered, distraught, foolish, laughable, ludicrous, lunatic, mad, maniac, maniacal, mentally ill, moonstruck, non compos mentis, of unsound mind, off, over-the-top, ridiculous, sane, screwy, touched, unbalanced, unsound, Daffy, bananas, not all there, crazy as a loon, mad as a hatter, nutty as a fruitcake, sick in the head, stark raving mad.

Usage examples for daft

  1. " No, a'm no daft ye needna be feared; but yir tae get yir first lesson in medicine the nicht, an' if we win the battle ye can set up for yersel in the Glen. – Beside the Bonnie Brier Bush by Ian Maclaren
  2. They were enraged, however, to think these politicians could imagine them so dead daft – The Honest American Voter's Little Catechism for 1880 by Blythe Harding
  3. In that hour I thought her as daft as the Sweet- Singers, whose nails were uncommonly near my cheek. – Salute to Adventurers by John Buchan