Ethereum

Loose Definitions:
Ethereum; the network or the sum total of everything that makes up Ethereum
Ether; the monetary asset and incentivize to secure the network
$ETH; the TradFi financialized custodial wrapper for Ether, the asset
ETH; the ticker
Eth; you’re being lazy and don’t want to type out Ethereum

“Nation-states will eventually be as ceremonial as modern-day constitutional monarchs.” -Robert Hettinga, The Geodesic Market

Also:
Etherium – your take is probably going to be nonsense