The word of the issue is plethora. Plethora, according to the Scott, Foreman Advanced Dictionary, means 1. excessive fullness; superabundance; excess. 2. an abnormal condition characterized by an excess of blood in the body.
The first definition for the word is used often in essays. When used correctly, a student is bound to get a plethora of compliments.
Try using it in your next essay!
A plethora of pumpkins may be found in the pumpkin patches this year.