old-age pension vs superannuation

old-age pension and superannuation both are nouns.

Word	Noun	Adjective	Verb	Adverb
old-age pension	Yes	No	No	No
superannuation	Yes	No	No	No

As nouns, old-age pension and superannuation are synonyms defined as:

old-age pension and superannuation: a monthly payment made to someone who is retired from work

Other synonyms of old-age pension include retirement benefit, retirement check, retirement fund, retirement pension.

old-age pension (noun)	superannuation (noun)
a monthly payment made to someone who is retired from work	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	the property of being out of date and not current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