Plethorious

Plethorious (adj.) – Having an excessive or overwhelming amount; abundantly full beyond necessity.
Origin: Derived from “plethora” (Greek: plēthōrḗ, meaning “fullness” or “excess”), combined with the suffix -ious, indicating an adjective form.

"The event was plethorious with celebrity appearances, extravagant decor, and lavish feasts."
"His vocabulary was plethorious, yet he never spoke in a pretentious manner."