superannuation vs obsoleteness

superannuation and obsoleteness both are nouns.

Word	Noun	Adjective	Verb	Adverb
superannuation	Yes	No	No	No
obsoleteness	Yes	No	No	No

As nouns, superannuation and obsoleteness are synonyms defined as:

superannuation and obsoleteness: the property of being out of date and not current

superannuation (noun)	obsoleteness (noun)
the act of discharging someone because of age (especially to cause someone to retire from service on a pension)	the property of being out of date and not current
the property of being out of date and not current
a monthly payment made to someone who is retired from work