A "veritable plethora" is a great and genuine excess of something. "Veritable" means, "being truly or very much so," and a plethora is, "an overabundance or excess."
Many emotions or thoughts.
superabundance, an excess
"Plethora" is a singular noun, so you say "is a plethora."
1.not nice 2.rude and disrespectful to other people 3.opposite of nice 4.cruel 5.harsh through words or actions