Superfluous
Part of speech: adjective
Definition: in excess of what is required or sufficient
Example sentence: It is not hard to compose, but what is fabulously hard is to leave the superfluous notes under the table.
Supernumerary
Part of speech: noun
Definition: A civil designation for somebody who works in a group, association or public office, without forming part of the regular staff; those distinguished from numerary. (For example, supernumerary judges are those who help the regular judges when there is a surplus amount of work.)An extra or walk-on in a film or play; spear-carrier.
Part of speech: adjective
Definition: Extra; beyond the standard or prescribed amount.Greater in number than.Beyond what is necessary.