What is bigger than a millennium? The answer is Eon. Eon often refers to a span of one billion years. Show activity on this post.
What is 100000000 years called? A million years is called a megaannum, which is often abbreviated ‘Ma.
What is above a century? Decade, Century, Millennium: Measurements of Time | Smartick.
How big is a millennia? millennium, a period of 1,000 years.