Crossword Clue:

Period of years

AnswerCrossword Clue
ERAPeriod of years
ERAPeriod of years.
CENTURYPeriod of years.
CENPeriod of years: abbr.
TEENSTransition period of years.
CENPeriod of years: Abbr.
LUSTRUMPeriod of five years.
EONPeriod of many years
CHILIADPeriod of a thousand years.
DECADEA certain period of years.
OCTAETERICRelating to a period of eight years.
TRICENTENARYRelating to a period of 300 years
IRONAGEPeriod of human history that began about 3,000 years ago
CAMBRIANTime period, 500 million years ago.
AGESMiddle ... (period from 500 to 1500 years ago)