eon

Although these time changes are only estimated to be a matter of milliseconds a year, they can accumulate over eons.

But it would be three long years — a veritable eon during that pre-MTV era — before Harrison released the LP’s worthy successor.

The lands whose governance was at stake are vaster than any nation, and it’s possible the consequences of the vote will be felt for eons.

One theory holds that, eons ago, several apocalyptic eruptions set off a runaway greenhouse effect on Venus, turning it from a temperate, waterlogged world into an arid desert of burned glass.

It happened to be where it was; it had probably been there for eons.