crack brained - Wordage.info - Free Thesaurus Tool for Word Discovery - Expanded Thesaurus, Reverse Dictionary Lookup

headless collapse: not having a head or formed without a head ; "the headless horseman"; "brads are headless nails"

unintelligent collapse: lacking intelligence; "a dull job with lazy and unintelligent co-workers"

unwise collapse: showing or resulting from lack of judgment or wisdom; "an unwise investor is soon impoverished"

ignorant collapse: uneducated in the fundamentals of a given art or branch of learning; lacking knowledge of a specific field; "she is ignorant of quantum mechanics"; "he is musically illiterate"; uneducated in general; lacking knowledge or sophistication; "an ignorant man"; "nescient of contemporary literature"; "an unlearned group incapable of understanding complex issues"; "exhibiting contempt for his unlettered companions"; unaware because of a lack of relevant information or knowledge; "he was completely ignorant of the circumstances"; "an unknowledgeable assistant"; "his rudeness was unwitting"

rattlebrained collapse: lacking sense or discretion; "his rattlebrained crackpot ideas"; "how rattlepated I am! I've forgotten what I came for"- Glenway Westcott

wrongheaded collapse: obstinately perverse in judgment or opinion; "a wrongheaded policy"

reasonless collapse: not endowed with the capacity to reason; "a reasonless brute"

scintillate collapse: physics: fluoresce momentarily when struck by a charged particle or high-energy photon; "the phosphor fluoresced"; give off; "the substance scintillated sparks and flashes"