eternity

As a noun eternity

is (uncountable) existence without end, infinite time.

As an adjective undefined is

lacking a definition or value.

As an adjective endless

is having no end.

As a noun eternity is

(uncountable) existence without end, infinite time.

As nouns the difference between foreverness and eternity

is that foreverness is the quality of being forever, of never coming to an end while eternity is (uncountable) existence without end, infinite time.

In uncountable|lang=en terms the difference between immorality and eternity

is that immorality is (uncountable) the state or quality of being immoral; vice while eternity is (uncountable) existence without end, infinite time.

In countable|lang=en terms the difference between immorality and eternity

is that immorality is (countable) an immoral act or practice while eternity is (countable) a period of time which extends infinitely far into the future.

As nouns the difference between immorality and eternity

is that immorality is (uncountable) the state or quality of being immoral; vice while eternity is (uncountable) existence without end, infinite time.

As an adjective eonian

is of or pertaining to an eon.

As a noun eternity is

existence without end, infinite time.

As nouns the difference between aeon and eternity

is that aeon is an alternative spelling of lang=en while eternity is existence without end, infinite time.

As nouns the difference between continuum and eternity

is that continuum is continuum while eternity is (uncountable) existence without end, infinite time.

As nouns the difference between spacetime and eternity

is that spacetime is (uncountable|physics) the four-dimensional continuum of the three spatial dimensions plus time while eternity is (uncountable) existence without end, infinite time.

As nouns the difference between eternity and eviternity

is that eternity is (uncountable) existence without end, infinite time while eviternity is eternal existence.

As nouns the difference between eternity and oblivion

is that eternity is existence without end, infinite time while oblivion is the state of forgetfulness or distraction; fig. confused.

As a verb oblivion is

{{cx|transitive|lang=en}} To consign to oblivion; to efface utterly.