Answer: REPOSTS

AnswerCrossword Clue
REPOSTSPuts on social media again
REPOSTSShares, as a friend's Facebook message
REPOSTSPuts up once more
REPOSTSPuts on a published list again.
REPOSTSFencing thrusts: Var.
REPOSTSPuts back on one's blog
REPOSTSShares on Facebook, maybe
REPOSTSShares on Tumblr, say
REPOSTSPuts on the message board again
REPOSTSAssigns elsewhere
REPOSTSEnters another forum message
repostsREPOST, to answer with a return thrust in fencing