obsoleteness vs superannuation

obsoleteness and superannuation both are nouns.

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

As nouns, obsoleteness and superannuation are synonyms defined as:

obsoleteness and superannuation: the property of being out of date and not current

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the property of being out of date and not current	the act of discharging someone because of age (especially to cause someone to retire from service on a pension)
	the property of being out of date and not current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