What is a 100000 year period called? Decade: Ten (10) years. Century: One hundred (100) years. Millennium: One thousand (1,000) years.
What is longer than a millennia? The answer is Eon. Eon often refers to a span of one billion years. Show activity on this post.
What would 1000 years be called? Since in Latin mille means “thousand”, a millennium lasts 1,000 years.
Is there a word for 1 million years? A million years is called a megaannum, which is often abbreviated ‘Ma.