Synonyms for Keep posted:

• v.

  •advise (verb)
  • give the word,
  • clue,
  • show,
  • put next to,
  • inform,
  • acquaint,
  • lay it out,
  • fill in,
  • update,
  • put on to,
  • apprise,
  • report,
  • make known,
  • let in on,
  • post,
  • notify,
  • warn,
  • put on the line,
  • tip off,
  • clue in.
  •counsel (verb)
  • caution,
  • tout,
  • urge,
  • reprehend,
  • steer,
  • prescribe,
  • direct,
  • suggest,
  • admonish,
  • advocate,
  • prompt,
  • tip,
  • charge,
  • guide,
  • enjoin,
  • order,
  • confab,
  • huddle,
  • recommend.
  •ready (verb)
  • fortify,
  • get,
  • fit,
  • make,
  • clear the decks,
  • gird,
  • brace,
  • make up,
  • arrange,
  • strengthen,
  • fix,
  • provide,
  • equip,
  • set,
  • organize.
  •tell (verb)
  • utter,
  • proclaim,
  • impart,
  • divulge,
  • confess,
  • express,
  • command,
  • state,
  • represent,
  • bid,
  • authorize,
  • mention,
  • say,
  • summon,
  • recite,
  • speak,
  • declare,
  • require,
  • leak,
  • announce,
  • explain.

• Other synonyms:

  •advise
  • filled in,
  • clued in,
  • kept posted,
  • making known,
  • put to,
  • tipped off,
  • give word,
  • made known,
  • posting,
  • tips off,
  • tipping off.
  •prepare
  • ready.

Antonyms for Keep posted:

• v.

  • advise
    fool, trick, hide, keep quiet, deceive, betray, keep secret, conceal, pretend, delude, keep mum, lie, withhold.
  • counsel
    dissuade, approve, misguide, discourage, mislead, learn, prevent, neglect.
  • instruct
    ask.
  • ready
    displace, disallow, weaken, disturb, fail, hurt, disorganize, disorder, hold back, lose, disarrange, let go, retard, destroy, slow, halt.
  • tell
    figure, guess, estimate, keep, question, misunderstand, listen, suppress, be quiet, deny, disavow, secrete.