WordNet sense 1 (the state of being more than full):

overabundance, surfeit

WordNet sense 2 (a quantity much larger than is needed):

nimiety, surplus, surplusage

WordNet sense 3 (immoderation as a consequence of going beyond sufficient or permitted limits):

excessiveness, inordinateness

WordNet sense 4 (more than is needed, desired, or required):

extra, redundant, spare, supererogatory, superfluous, supernumerary

WordNet sense 5 (excessive indulgence):

overindulgence