Synonyms of eternity

eternity

noun

i-ˈtər-nə-tē 

1

as in perpetuity

endless time

the question whether the universe will end someday or continue to exist in eternity

Synonyms & Similar Words

• perpetuity
• infinity
• foreverness
• everlasting
• permanence
• permanency
• timelessness
• endlessness
• boundlessness
• limitlessness
• interminableness

Antonyms & Near Antonyms

• impermanence
• transience
• transitoriness
• ephemerality
• temporariness

2

as in immortality

unending existence after death

a firm belief in the eternity of the soul

Synonyms & Similar Words

• immortality
• afterlife
• hereafter
• beyond
• afterworld
• otherworld

3

as in forever

a long or seemingly long period of time

we waited in line for tickets for an eternity

Synonyms & Similar Words

• forever
• months
• long
• age
• moon
• eon
• blue moon
• cycle
• infinity
• donkey's years
• coon's age
• lifetime

Antonyms & Near Antonyms

• moment
• instant
• minute
• second
• flash
• twinkle
• split second
• wink
• shake
• twinkling
• trice
• jiffy
• nanosecond
• microsecond

Example Sentences

Recent Examples of eternity

The trial date of March 2 feels like an eternity from now for an industry on edge. — Dominic Patten, Deadline, 16 Sep. 2026

Sounds simple enough, but often those two minutes can feel like an eternity. — Maryna Holovnova, New Atlas, 16 Sep. 2026

And giving Woody Harrelson and Matthew McConaughey five or so minutes (an eternity) to promote their upcoming vanity project? — Jackson McHenry, Vulture, 15 Sep. 2026

Nasmaranian’s host needs to be replaced every so often in eternity. — Literary Hub, 15 Sep. 2026