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

Heavy clay also holds onto moisture for an eternity, which many flowers and shrubs can’t tolerate. — Brandee Gruener, Southern Living, 29 July 2026

In the rapidly evolving electric vehicle space, a single minute is a eternity. — Mrigakshi Dixit, Interesting Engineering, 29 July 2026

Just a little shard of eternity that had both of them in it, on the dance floor. — Sheila Heti, New Yorker, 26 July 2026

In addition to her sapphire and diamond engagement ring—once famously worn by Princess Diana—the Princess of Wales also wears a $2,200 diamond eternity band from Annoushka. — Rachel Burchfield, InStyle, 22 July 2026