veteran

Synonyms: adept battle-scarred been around disciplined exercised expert from way back hardened inured knows one’s stuff long-serving long-time not born yesterday of the old school old old-time practical practiced pro proficient skilled sophisticated steady trained up to speed versed vet weathered wise wise to ways worldly

Antonyms: amateur green inexperienced

Synonyms: expert gi old guard old hand old pro old salt old soldier oldtimer pro shellback sourdough trouper vet warhorse

Antonyms: rookie