We don't have synonyms for aethers yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are aether, tethers and wethers.
(n) :
(Greek mythology) One of the Greek primordial deities who was the personification of light, brother-husband of Hemera and grandson of Chaos.
(n) :
Alternative spelling of ether. [(uncountable, literary or poetic) The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities.]
(n) :
(Greek mythology) One of the Greek primordial deities who was the personification of light, brother-husband of Hemera and grandson of Chaos.
(n) :
Alternative spelling of ether. [(uncountable, literary or poetic) The substance formerly supposed to fill the upper regions of the atmosphere above the clouds, in particular as a medium breathed by deities.]