eonian

Definitions of eonian
1

adj of or relating to a geological eon (longer than an era)

Synonyms:
aeonian

adj continuing forever or indefinitely

Synonyms:
aeonian, ageless, eternal, everlasting, perpetual, unceasing, unending
lasting, permanent
continuing or enduring without marked change in status or condition or place

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.