aion

As a letter s

is the letter s with a.

As an initialism aion is

(ophthalmology) (''us ).

As a noun initialism

is a term formed from the initial letter or letters of several words or parts of words, but which is itself pronounced letter by letter.

As an initialism aion is

(ophthalmology) (''us ).

As a proper noun Aaron

is the elder brother of Moses in the Book of the Exodus, and in the Quran.

As an initialism AION is

Anterior ischaemic optic neuropathy (UK), Anterior ischemic optic neuropathy (US).

As initialisms the difference between eon and aion

is that eon is ΕΟΝ, the Greek National Organisation of Youth similar to the Hitler Youth, it was formed before WWII and disbanded in 1941 while AION is Anterior ischaemic optic neuropathy (UK), Anterior ischemic optic neuropathy (US).

As a noun eon

is eternity.

As an initialism aion

is (ophthalmology) (''us ).

As a noun timeline is

a graphical representation of a chronological sequence of events (past or future); a chronology.

As a verb timeline is

to analyse a sequence of events or activities.

As an initialism AION

is Anterior ischaemic optic neuropathy (UK), Anterior ischemic optic neuropathy (US).

As a noun aeon is

an alternative spelling of lang=en.