1.
Plenitude is a feeling that an experience is satisfying because it is full or complete. (FORMAL)
The music brought him a feeling of ~ and freedom.
= fullness, completeness
N-UNCOUNT
2.
If there is a ~ of something, there is a great quantity of it. (FORMAL)
What is the use of a book about interior design without a ~ of pictures in color?
= abundance
N-SING: usu N of n