kya
millennium
millenary
megayear
millennial
Recent epoch
Holocene epoch
Recent
multicentennial
Holocene
gigayear
secular
Quaternary
priscan
hoary
Age of Man
Quaternary period
rusty
millennian
Carboniferous
Carboniferous period
anciently
100s
historically
Mesozoic era
Mesozoic
Cenozoic
Cenozoic era
Age of Mammals
Age of Reptiles
centimillennium
centuried
superancient
century
eon
centennial
anciency
trimillennial
multisecular
Phanerozoic eon
Phanerozoic aeon
plurisecular
Phanerozoic
bimillenary
intercentennial
giga-annum
yearthousand
centennially
C.
premier
bicentennial
1530s
Ypresian
intersecular
Mesolithic
storied
Tertiary
Tertiary period
Mesolithic Age
archaeographically
Epipaleolithic
old as the Pyramids
world-old
quadrimillennial
ancient history
age
Eocene
multimillennial
paleodata
decamillennium
relic
predynastic
Paleozoic era
yearhundred
Paleozoic
Cisuralian
historico-
dynastic
era
decades young
centurial
millenarian
paleoindicator
neros
Eocene epoch
historic
paleostructure
Eastern Turkestan
Neolithic Age
bicentennially
Neolithic
Flavian
geohistory

English words for 'thousands of years'

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