The word is "millennium".
millennium
The word meaning 1,000 years is millennium.
The word meaning 1,000 years is millennium.
The word Biennial means Every two years
Sextennial means "Recurring every six years."
Biannual~ this means twice in one yearbiennial~ this means once every two years
Sextennial means "Recurring every six years."
biennial
The word is... bicentennial.
tri-annual
Bicentennial
enneatical
Centuries.