SYN: Soon, shortly, presently.
ANT: Hereafter.
=
KEY: Anonymous.
SYN: Nameless, unattested, authorless, unidentified, unauthenticated.
ANT: Authenticated, attested, identified, authorized, verified, signed.
=
KEY: Answer.
SYN: Reply, response, counter-argument, confutation, acceptance, (as of a challenge), tally, counterpart, solution, vindication, apology, exculpation, defense, rejoinder, repartee, retort.
ANT: Challenge, question, defiance, summons, interrogation, query.