old hand Antonyms

new chum tool tiro tenderfoot starter rooky recruit puppyish proselyte probationer undergraduate upstart noviciate parvenue inductee draftee schoolboyish rookie newbie yearling whippersnapper postulant pledgee plebe cub colt childly catechumen cadet bran-new beginner babe amateur dabbler entrant parvenu novitiate novice newcomer learner inceptor hacker Greenhorn freshman alphabetarian