aeon
Geological time unit
An aeon is an immeasurably long period of time, often suggesting eternity or near-eternity.
The word appears in religious and philosophical contexts to describe cosmic ages or divine timeframes, and in geology to name the largest divisions of Earth's history.
In everyday use, aeon is hyperbolic: I haven't seen you in aeons.
The spelling eon is more common in American English.
Freedom from temporal decay
- infinityUnlimited extent or quantity
- perpetuityInfinite continuation of time
- everlastingLasting for all time
- boundlessWithout any boundaries
unending · immortality · endless · sempiternal · ageless · deathless · limitless · interminable
Distinct historical period
- eraDistinct historical period
- periodPunctuation ending sentences
- HoloceneCurrent geological epoch
- PleistoceneAncient glacial geological period
Precambrian · Cambrian · Mesozoic · Cenozoic · Paleozoic · Proterozoic · Archean · stratigraphy
Great age, ancient era
- primordialExisting from the start
- prehistoricBefore documented civilization
- archaicBelonging to earlier times
- immemorialToo old to recall
bygone · ancestral · olden · millennia · primal · antediluvian
Greek city-state magistrate
Complete system or domain
- galaxyGravitationally bound stellar mass
- nebulaInterstellar gas formation
- cosmologyStudy of universal structure
- space-timeFused dimensional framework
singularity · astrophysics · multiverse · entropy · light-year · parsec · redshift
timelessness
Freedom from temporal decay
- infinityUnlimited extent or quantity
- perpetuityInfinite continuation of time
- everlastingLasting for all time
boundless · unending · immortality · endless · sempiternal · ageless · deathless · limitless · interminable · infinite
epoch
Distinct historical period
Pleistocene · Precambrian · Cambrian · Mesozoic · Cenozoic · Paleozoic · Proterozoic · Archean · stratigraphy · fossilized
antiquity
Great age, ancient era
- primordialExisting from the start
- prehistoricBefore documented civilization
- archaicBelonging to earlier times
immemorial · bygone · ancestral · olden · millennia · primal · antediluvian
archon
Greek city-state magistrate
universe
Complete system or domain
- galaxyGravitationally bound stellar mass
- nebulaInterstellar gas formation
- cosmologyStudy of universal structure
space-time · singularity · astrophysics · multiverse · entropy · light-year · parsec · redshift
- Deep TimeArchean, Proterozoic, Precambrian, deep time
- cosmic timeepoch, era, age, deep time, eternity
- Gnosticismgnosis, archons, demiurge, archon, Sophia
- Religious DualismGnosticism, Zoroastrianism, good and evil, light and darkness, Bogomilism
- old time wordsfortnight, twelvemonth, yore, erstwhile, ere
- spiritsghost, vodka, rum, whiskey, brandy