vastness

Extension is a related term of vastness.

As nouns the difference between extension and vastness

is that extension is tract (an area) while vastness is (uncountable) the quality of being vast.

As nouns the difference between vastness and diversity

is that vastness is (uncountable) the quality of being vast while diversity is the quality of being diverse or different; difference or unlikeness.

As nouns the difference between vastness and boundlessness

is that vastness is (uncountable) the quality of being vast while boundlessness is the property of being boundless, of being without limits or ends.

As nouns the difference between vastness and emptiness

is that vastness is the quality of being vast while emptiness is the state or feeling of being empty.

As a proper noun Emptiness is

a Chinese constellation near Aquarius and Equuleus, one of the 28 lunar mansions and part of the Black Turtle.

As nouns the difference between vastity and vastness

is that vastity is emptiness or desolation while vastness is the quality of being vast.

As nouns the difference between vastness and tiny

is that vastness is the quality of being vast while tiny is a small child; an infant.

As an adjective tiny is

very small.

As an adverb vastly

is greatly, in a vast manner.

As a noun vastness is

(uncountable) the quality of being vast.

Number is a related term of vastness.

In countable|lang=en terms the difference between number and vastness

is that number is (countable) a performance; especially, a single song or song and dance routine within a larger show while vastness is (countable) something vast.

As nouns the difference between number and vastness

is that number is (countable) an abstract entity used to describe quantity while vastness is (uncountable) the quality of being vast.

As a verb number

is to label (items) with numbers; to assign numbers to (items).

As an adjective number

is (numb).

As nouns the difference between hugeness and vastness

is that hugeness is the quality of being huge; immensity or enormity while vastness is the quality of being vast.