Synonyms of scatterbrains

1 Syllable

kook, loon, nut, crank

2 Syllables

flake, psycho, crackpot, maniac, cuckoo

3 Syllables

fruitcake, demoniac, neurotic, paranoid, lamebrain, psychopath, psychotic

4 Syllables

schizophrenic, sociopathic