EONIAN Scrabble 6 Words With Friends 8 Definition adjective of or relating to a geological eon (longer than an era). — synonyms: aeonian adjective continuing forever or indefinitely. — synonyms: ageless, aeonian, eternal, everlasting, perpetual, unending, unceasing See all 29 words you can make from EONIAN → 6-letter words Words starting with E Words ending with N ← Unscramble different letters