old stager vs veteran

old stager and veteran both are nouns.

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

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

old stager and veteran: 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, oldtimer, stager, warhorse.

old stager (noun)	veteran (noun)
an experienced person who has been through many battles; someone who has given long service	an experienced person who has been through many battles; someone who has given long service
	a person who has served in the armed forces
	a serviceman who has seen considerable active service

old stager (adjective)	veteran (adjective)
	rendered competent through trial and experience