excess vs surplusage

excess and surplusage both are nouns.

Word	Noun	Adjective	Verb	Adverb
excess	Yes	Yes	No	No
surplusage	Yes	No	No	No

As nouns, excess and surplusage are synonyms defined as:

Other synonyms of excess include nimiety, surplus.

excess (noun)	surplusage (noun)
excessive indulgence	a quantity much larger than is needed
immoderation as a consequence of going beyond sufficient or permitted limits
a quantity much larger than is needed
the state of being more than full

excess (adjective)	surplusage (adjective)
more than is needed, desired, or required