Synonyms for Pro:

adj.

clever (adjective)
adept.
pro (adjective)
favoring.

n.

budding, deputy, blue-collar, creative, acting, casual, emeritus, designate. approving, side, supportive, partial, positive, sympathetic. commuter, ancillary, career woman, auxiliary, cowboy, breadwinner, designated hitter, desk person, apparatchik, duty officer. veteran, the intelligentsia, observer, pundit, intellectual. spotter, spot, cross-training, train, personal trainer, coach, coaching. ace (noun)
master, wizard, genius.
authority (noun)
pundit, professional, veteran, specialist, whiz, connoisseur, expert.
consultant (noun)
authority, maven.
expert (noun)
consultant, adept, master, genius, technician, specialist, maven, connoisseur, journeyman, buff, sophisticate, authority, expert, whiz, wizard, crackerjack, artist, professional.
person (noun)
professional.
pro (noun)
favoring, professional, affirmative.
veteran (noun)
veteran.

Other synonyms:

supportive, partial, cross-training, sympathetic, personal trainer, approving, coaching. spotter. positive. side. coach. train. spot. Other relevant words:
partial, side, pundit, favoring, train, cross-training, sympathetic, approving, affirmative, supportive, veteran.

Usage examples for pro

  1. Since the arrest of young Lackman she had come forward and put up funds to finance the " People's Council," and the " Anti- Conscription League," and all the other activities which for the sake of convenience were described by the term " pro German." – 100%: The Story of a Patriot by Upton Sinclair
  2. I believe your friend Mifflin is pro German, too. – The Haunted Bookshop by Christopher Morley
  3. I am perfectly aware that he has taken a good deal of interest in you, but when did he ever do anything for you without a quid pro quo? – The Life and Genius of Nathaniel Hawthorne by Frank Preston Stearns