vacuity

As nouns the difference between vacuity and hollow

is that vacuity is emptiness while hollow is a small valley between mountains; a low spot surrounded by elevations.

As an adjective hollow is

(of something solid) having an empty space or cavity inside.

As an adverb hollow is

(colloquial) completely, as part of the phrase beat hollow or beat all hollow.

As a verb hollow is

to make a hole in something; to excavate (transitive) or hollow can be to urge or call by shouting; to hollo.

As an interjection hollow is

.

As a noun vacuity

is emptiness.

As an adjective undefined is

lacking a definition or value.

As nouns the difference between void and vacuity

is that void is an empty space; a vacuum or void can be while vacuity is emptiness.

As an adjective void

is containing nothing; empty; vacant; not occupied; not filled.

As a verb void

is (label) to make invalid or worthless.

As nouns the difference between melancholy and vacuity

is that melancholy is (historical) black bile, formerly thought to be one of the four "cardinal humours" of animal bodies while vacuity is emptiness.

As an adjective melancholy

is affected with great sadness or depression.

As nouns the difference between vacuity and desolation

is that vacuity is emptiness while desolation is desolation.

As nouns the difference between acumen and vacuity

is that acumen is quickness of perception or discernment; penetration of mind; the faculty of nice discrimination while vacuity is emptiness.

As nouns the difference between vacuity and deficiency

is that vacuity is emptiness while deficiency is (uncountable) inadequacy or incompleteness.

As a noun vacuity is

emptiness.

As nouns the difference between vacuity and acuity

is that vacuity is emptiness while acuity is sharpness or acuteness, as of a needle, wit, etc.

As nouns the difference between vacancy and vacuity

is that vacancy is an unoccupied position or job while vacuity is emptiness.