Perpetuity (Endless duration)
Nouns
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perpetuity, eternity, everness, aye, sempiternity, immortality, athanasia
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interminability, agelessness, everlastingness etc. adj.
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perpetuation
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continued existence, uninterrupted existence
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perennity
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permanence (durability) [Long duration.] Diuturnity.
Verbs
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last forever, endure forever, go on forever
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have no end. eternize, perpetuate.
Adjectives
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perpetual, eternal
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everduring, everlasting, ever-living, ever-flowing
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continual, sempiternal
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coeternal
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endless, unending
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ceaseless, incessant, uninterrupted, indesinent, unceasing
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endless, unending, interminable, having no end
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unfading, evergreen, amaranthine
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neverending, never-dying, never-fading
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deathless, immortal, undying, imperishable.
Adverbs
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perpetually etc. adj.
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always, ever, evermore, aye
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for ever, for aye, till the end of the universe, forevermore, forever and a day, for ever and ever
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in all ages, from age to age
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without end
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world without end, time without end
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to the end of time, to the crack of doom, to the 'last syllable of recorded time'" [Macbeth]
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till doomsday
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constantly etc. (very frequently) Frequency.
Phrases
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but thou shall flourish in immortal youth" [Addison]
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Eternity! thou pleasing, dreadful thought" [Addison]
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her immortal part with angels lives" [Romeo and Juliet]
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[Goethe's motto]