The word that means "an excess" or "an overabundance in supply" is surfeit.
The definitions of all of the words are below:
Surfeit- an excessive amount of something
Melancholy- a feeling of pensive sadness, typically with no obvious cause
Petulance- the quality of being childishly sulky or bad-tempered
Sinuousness (Sinuous)- having many turns and curves
