Scatterbrain is a related term of dunderhead.
As nouns the difference between scatterbrain and dunderhead
is that scatterbrain is a flighty, disorganized or forgetful person while dunderhead is a stupid person; a dunce.
scatterbrain
English
Noun
(
en noun)
A flighty, disorganized or forgetful person.
Related terms
* scatterbrained