Synonyms of brainsick

1 Syllable
daft, mad, maer, nuts
2 Syllables
crazed, dotty, bonkers, loco, distraught, batty, nutty, cracked, maniac, moonstruck, touched, crackers, unsound, crazy
3 Syllables
psychotic, maniacal, unhinged, lunatic, demented
4 Syllables
disordered, unbalanced