old stager vs oldtimer

old stager and oldtimer both are nouns.

Word	Noun	Adjective	Verb	Adverb
old stager	Yes	No	No	No
oldtimer	Yes	No	No	No

As nouns, old stager and oldtimer are synonyms defined as:

old stager and oldtimer: an experienced person who has been through many battles; someone who has given long service

Other synonyms of old stager include old-timer, old hand, stager, veteran, warhorse.

old stager (noun)	oldtimer (noun)
an experienced person who has been through many battles; someone who has given long service	an elderly man
	an experienced person who has been through many battles; someone who has given long service