MEANING: noun: An abundance or excess.

ETYMOLOGY: From Latin plethora, from Greek plethore (fullness), from plethein (to be full). In the beginning the word was applied to an excess of a humor, especially blood, in the body. Earliest documented use: 1541.

PLETHORAE - abundances (fem.)

PLETHERA - soft forgetfulness

PLETHIRA - an over-funded retirement plan