The Collaborative International Dictionary of English v.0.48:

make known \make known\ v. t.
   To reveal; to disclose; as, the congressman made known his
   interest in the company only after he voted on the bill.
   [PJC]

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "make known":
   air, break it to, break the news, breathe, broach, broadcast,
   come out with, communicate, confide, confide to, convey, display,
   disseminate, divulgate, divulge, evulgate, get across, get over,
   give, give out, give vent to, give word, hand on, impart,
   leave word, let get around, let in on, let out, make public,
   open up, out with, pass, pass along, pass on, publish, put out,
   render, report, reveal, send, send word, share, share with, signal,
   tell, transfer, transmit, utter, vent, ventilate