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

Merely because the Founders had to cut a deal to achieve an imperfect outcome does not bind the citizenry to abide by it for eternity. — Jonathan Chait, The Atlantic, 22 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

In the age of Instagram, everyone’s 15 minutes of fame has turned into an eternity. — Classical Music Critic, Los Angeles Times, 21 July 2026

That’s highly unlikely considering Lestat and Louis were steps away from getting back together before they were beheaded and had spared only a small moment to reckon with her spending an eternity stuck in purgatory without Madeleine (Roxane Duran). — Sabrina Reed, Forbes.com, 20 July 2026