airhead

As an adjective dense

is having relatively high density.

As a noun airhead is

a silly, foolish or unintelligent person.

As nouns the difference between airhead and nincompoop

is that airhead is (pejorative) a silly, foolish or unintelligent person or airhead can be a landing area for aircraft for supplying an operation, military or other, usually temporary while nincompoop is a silly or foolish person.

As an adjective dumb

is unable to speak; lacking power of speech.

As a verb dumb

is to silence.

As a noun airhead is

a silly, foolish or unintelligent person.

As an adjective scatterbrained

is having the qualities of a scatterbrain.

As a noun airhead is

a silly, foolish or unintelligent person.

As nouns the difference between taxonomy and airhead

is that taxonomy is the science or the technique used to make a classification while airhead is (pejorative) a silly, foolish or unintelligent person or airhead can be a landing area for aircraft for supplying an operation, military or other, usually temporary.

Airhead is a related term of airheaded.

As a noun airhead

is (pejorative) a silly, foolish or unintelligent person or airhead can be a landing area for aircraft for supplying an operation, military or other, usually temporary.

As an adjective airheaded is

silly, foolish.