Answer:

insane

AnswerCrossword Clue
INSANEMad
INSANEMoonstruck
INSANEPreposterous
INSANEBonkers
INSANENon compos mentis
INSANECuckoo
INSANENuts or bananas
INSANEX Gamer's "amazing"
INSANEBeyond daring
INSANEUtterly senseless
INSANEDeranged
INSANEIrrational
INSANEManiacal
INSANENuts
INSANEWacko
INSANEBats
INSANEOff one's rocker
INSANECertifiable
INSANEBughouse
INSANETotally out of the question
INSANEUtterly ridiculous
INSANECompletely cuckoo
INSANECracked beyond repair?
INSANECrackers
INSANEReally mad?
INSANEAbsurd
INSANEBananas, so to speak
INSANELike some nuts
INSANEAround the bend, so to speak
INSANEPreposterous, as an idea
INSANEMeshuga
INSANE"Non compos mentis"
INSANERidiculous
INSANELike a fruitcake
INSANEDemented.
INSANEUtterly senseless.
INSANECrazed.
INSANESenseless.
INSANEImpractical.
INSANEUtterly foolish.