Plenitude.
Variety. Plethora. Either one works.
"Plethora" is a singular noun, so you say "is a plethora."
Plethora is a noun.
It is pleth that means many. The word derives from the Greek language and the word plethora exist as is in the language.
no
The noun plethora (a plethora) uses singular verb forms.The word plethora is an uncountable (mass) noun, a type of aggregate noun that refers to an unspecified but large number of elements, e.g. a plethora of choices.
The plethora of escapes from supposedly secure prisons embarrassed the hapless wardens. The success of his videos inspired a plethora of imitators.
"There was a plethora of items in her desk." "Plethora" is not a verb / action word, so it will not change forms from a present to a past tense.
(n.) - an overabundance, an excess
idiosyncrasy, plethora
Plethora
An 'abundance' or a 'plethora'.