Nonsensical is a related term of harebrained.
As adjectives the difference between nonsensical and harebrained
is that nonsensical is without sense; unmeaning; absurd; foolish; irrational; preposterous while harebrained is (of an idea or plan etc) absurd, foolish or stupid.
nonsensical
English
Adjective
(
en adjective)
Without sense; unmeaning; absurd; foolish; irrational; preposterous.
Related terms
* nonsense
harebrained
English
Alternative forms
* hare-brained
* hairbrained
Adjective
(
en adjective)
(of an idea or plan etc) absurd, foolish or stupid
(of a person) frivolous and silly; featherbrained or scatterbrained