Crackpottery vs. Crackpot

Crackpottery and Crackpot Definitions
Crackpottery
The behaviour of a crackpot; madness.
Crackpot
An eccentric person, especially one with bizarre ideas.
Crackpot
Foolish; harebrained
A crackpot notion.
Crackpot
(informal) An eccentric, crazy or foolish person.
Time will tell whether he is a crackpot or a genius for promoting that sort of idea.
Crackpot
(informal) Someone addicted to crack cocaine (i.e. a drug addict).
Crackpot
(informal) Eccentric or impractical.
A crackpot idea
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Crackpot
A whimsically eccentric person.
Crackpot
A whimsically eccentric person