giga-annum
gigayear
mega-annum
Age of Reptiles
Mesozoic
Mesozoic era
Age of Mammals
Cenozoic
Cenozoic era
yearthousand
megayear
C.
multi-billion
decades young
My
Tertiary
Tertiary period
Myr
decadally
milliard
sweat rash
prickly heat
millionennium
intersecular
multimillennial
Paleozoic
Paleozoic era
Quaternary
Quaternary period
year 2000 problem
gigabuck
Age of Man
Y2K bug
billionfold
millennial
millennian
megalight-year
billiard
quincentennium
Holocene epoch
Recent epoch
Holocene
Recent
teens
multidecadal
age
penteteric
quinquennalian
THz
terahertz
2060s
intercentennial
bimillennial
multitrillion
Carboniferous period
pralaya
millenarian
Carboniferous
quadringenary
eon
bicentennial
trillionth
annum
millennium
bimillenary
yearhundred
millenary
octillion
quintillion
2080s
Oligocene
centurial
epochally
oneties
secular
megabillion
megabuck
neoglaciation
decadeslong
intradecadal
centennially
sextillion
chronologically
Furongian
miliarial
Pleistocene epoch
epochal
Pleistocene
centennial
SC
supracentenarian
megafortune
Glacial epoch
kya
multisecular
quadrimillennial
two commas
Archaeozoic
plurisecular

English words for 'Gigayear, a billion years.'

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