Adjective: Abundant in supply or quantity.
Synonyms: abundant - plentiful - profuse - ample - rich - generous
COPIOUS is a word which indicates to all around you that your Vocabulary is rich and varied.
A classic use of the word comes from the courtroom scene:
The jury is engaged and taking COPIOUS notes.
That association is so vivid that I see a jury in my mind as a trigger to this word.
The more pictures that flood your mind, the greater the options you will have in speaking and writing our great language.