- EONS
- Donkey's years
- Great times?
- Millions of years
- Forever
- Forever, seemingly
- Geologic times
- Time periods
- Ages
- Long periods of time
- Roughly forever
- Years and years and years and ...
- Largest units of geological time
- Wait at the DMV, it seems
- Long stretches
- Time it takes for that guy at the bar to finish his story about a New Yorker article he read
- Time elapsed since I last went to the movies, seemingly
- For-fucking-ever
- Thousands of years
- Really long time
- Many millennia
- Eternity, seemingly
- Geologic span
- Huge spans
- Time, seemingly, between finishing a freelance job and getting paid
- Very long spell
- Big stretches
- Plenty of time
- Long times
- Mind-numbingly long time
- Stretches between ice ages
- Long, long time
- Slow-to-pass spells
- Gobs of time
- Geological spans
- Interminable times
- A really long time
- Billions of years
- Seemingly forever
- Long time to wait
- Quite some time
- Long periods
- From here to eternity?
- Long, long times
- Long periods, geologically
- Geological periods
- Ages and ages
- Long, long time periods
- Years and years
- Geologic time divisions
- Paleontological spans
- Hyperbolic stretches of time
- Immeasurable spans
- Mountains formed over them
- Astronomical units
- Protracted stretch, to say the least
- Wait at the D.M.V., seemingly
- What seems like forever
- Spans over significant lengths
- Spell for much more than a bit
- Very significant stretch
- The Earth has experienced four of them
- What it hopefully won't take for you to solve this puzzle
- What it takes for stars to burn out
- They take quite a while
- Hard-to-conceive stretches
- What one that drags apparently takes
- Practically forever
- Ages and ages and ages
- Extremely long times
- Looooooong times
- Many, many, many moons
- Billions of years, geologically
- Forever and a day
- A loooong time
- Forever, so to speak
- Millennia
- Units of geologic time
- Forever, it seems
- Millennia upon millennia
- Mind-boggling time spans
- Interminable length of time
- A long, long time
- Almost eternities
- Almost eternity
- Many, many moons
- Multiple millennia
- Years on end
- At least two billion years
- Billions and billions of years
- Geological time periods
- Seeming eternity
- Astronomical periods
- Really long times
- Units on the geologic time scale
- Centuries of centuries
- Evolutionary time periods
- Geologic timespans
- Almost an eternity
- An eternity
- Geologic periods
- Tons of time
- Billion-year periods
- Geologists' periods
- Long, long time spans
- A metaphorical eternity
- Forever and ever
- Nearly forever
- Vast stretches of time
- Ages upon ages
- Countless years
- Quite a while
- Vast periods
- Extremely long time periods
- Inconceivably long times
- Very long stretches
- A looooooooong time
- A ridiculously long time
- A long ass time
- Unfathomably long stretch of time
- Centuries
- Forevers
- Time out of mind
- Endless time
- Timeless times
- Units of time
- Many eras
- Forever, figuratively
- Many, many years
- Looooong times
- Very long periods
- Many millenia
- A dog's age
- Extensive periods
- A looooong time
- Loooong time
- Many many centuries
- Zillions of years
- Big times
- Eternities
- Hundreds of centuries
- A seeming eternity
- A very long time
- Geologic stretches
- Eternities, seemingly
- Geologic procession
- Not just centuries
- Tremendous spans
- Eras upon eras
- Geological timespans
- Long spans
- Very long time
- Quite a stretch
- Considerable stretches
- Many ages
- Geologic time frames
- Geologic spans
- Quite a long time
- Ages on end
- Long time
- Billion-year stretches
- Almost forever
- Unfathomable stretches
- Extra-long durations
- Major time periods
- Very long times
- Immeasurable periods
- Lengthy units of time
- Stellar periods
- Extremely long time
- Time on end
- Countless ages
- Very long spans
- Basically forever
- Ages upon ages of time
- Essentially forever
- Cosmic periods
- What mountains rise over
- Earth science measures
- Innumerable years
- Peaks form over them
- Astronomer's measures
- Gorges are carved over them
- Unimaginably long time
- Very long time spans
- Extreme stretches
- Lengthy periods of time
- Extremely long periods
- Much, much more than a wink
- What mountains form over
- Mammoth units
- Many, many millennia
- Geologic divisions
- They last a long time
- Astronomical time periods
- Mammoth time units
- Geologic cycles.
- Cosmic cycles.
- Endless periods of time.
- Grand divisions of geological time.
- Long spaces of time.
- Geological times.
- Grand divisions of time.
- Divisions of time.
- Time immemorial.
- Trillions of years.
- Incalculable ages.
- Geologist's time scheme.
- A thousand ages.
- Vast ages.
- Years without end.
- Great cycles of years.
- Infinities of time.
- Untold centuries.
- Years untold.
- Incalculable periods.
- Lots of time.
- Uncounted years.
- Untold ages.
- Millenia.
- Spaces of time.
- Thousands of ages.
- Cycles.
- Time divisions.
- Time eternal.
- Periods of time.
- Time unlimited.
- Eternity.
- Geologist's concern.
- Many years.
- Times.
- Millennia plus.
- Untold years.
- Time spans
- Kalpas
- Periods
- Geological time divisions
- Many millenniums
- Ages of long duration
- Millenniums, and more
- Ages that boggle the mind
- Mind-boggling ages
- Years and years and years
- Time beyond measure
- A considerable spell
- Great time spans
- Lo-o-ong time
- Time upon time
- Epochs and epochs
- Geological divisions
- Many centuries
- Age after age
- Centuries and centuries
- Indefinite time periods
- Indefinite years
- Times immeasurable
- Ages galore
- Segments of eternity
- Countless centuries
- Mind-boggling times
- Years upon years
- Like, forever!
- Long runs?
- Cosmic times
- Infinite time
- Long, long periods
- Inconceivable times
- Very long periods of time
- Eternities, almost
- Geologists' times
- A lot of time
- Incalculable amount of time
- A lo-o-ong time
- Astronomical figures
- Stretch of history
- Time and time again
- A long time to wait
- Spans of history
- An eternity, seemingly
- An extremely long time
- Awfully long time
- Lengthy time units
- Major stretches
- How long it takes canyons to form
- Stretches of history
- Just about forever
- Time to evolve?
- Immense time spans
- Millennia on end
- A lot of the time?
- Forever, basically
- Mountains have developed over them
- How long it takes mountains to form
- Mountains form over them
- Time since the Big Bang
- Geological units
- Life span of a star
- Mountains have grown over them
- Stars exist over them
- Immense spans
- Volcanoes develop over them
- Immensely long stretches
- They go to great lengths
- Earth's longest time divisions, geologically
- Many, many, many, many, many moons
- Practically an eternity
- Very long stretches of time
- Forever and a day, say
- Periods longer than eras
- Galactic time spans
- Near-infinite timespans
- Nigh-infinite periods
- Tech support wait time, typically
- So long!
- Gazillions of years
- Length of a car ride with toddlers, seemingly
- Fore-e-e-e-ver
- Billion-year spans
- Archean and Proterozoic
- Immeasurable times
- Extremely long time frames
- Indefinitely long time periods
- Many moons
- Thousands and thousands of years
- Vast sweep of time
- Indefinitely long periods of time
- A billion years, geologically
- Incalculable amounts of time
- Billion-year increments, in geology
- One billion years, geologically
- Geologic time periods
- Long geologic stretches
- Unimaginably long stretches
- Long, long stretches
- A long, long, long time
- See 37-Down
- Incredibly long time
- Immeasurable time
- Not quite eternity
- Spans of many centuries
- Massive time periods
- Periods of two or more of 40-Across
- **Ages and ages (2 and 3)
- They're much longer than 35-Across
- Important times
- Infinity almost
- Ages and ages and . . .
- Endless times
- Several thousand million years
- Cryptozoic and Phanerozoic
- Multi-era spans
- Billion-year increments
- Extremely long stretches
- Immeasurably long periods of time
- They seem to last forever
- Thousands of centuries
- Long time periods
- Many, many ages
- Mind-boggling spans
- Long stretches of time
- Vast time periods
- Long time spans
- Loooong periods of time
- Seemingly interminable periods
- Very, very long time periods
- Vast spans
- Loooooooong times
- Geological intervals
- Periods subdivided into eras
- Interminably long times
- Looong times
- Incredibly long times
- Near-eternity
- Many lifetimes
- Unbearable waits
- Eternity, so to speak
- Practical eternity
- Interminable periods
- The Hadean, the Archean and the Proterozoic, e.g.
- Such a long time
- Really long stretches of time
- Unbearable wait, seemingly
- Archean and Hadean, e.g.
- History stretches
- Hadean, Archean, Proterozoic and Phanerozoic
