simultaneously

• Almost immediately afterward three of our starboard main-deck guns spoke simultaneously, and, as the smoke from them swept away ahead of us, I heard the captain of the aftermost quarter-deck gun cry out that all three shots had hulled the French ship, for he had seen the splinters fly in three distinct places. —  A Middy of the King A Romance of the Old British Navy
• Then the two muskets--which the wanderers had tenaciously retained throughout their perilous journey across the mountains--barked out their death message simultaneously, and the flock rose again with loud squawks of alarm, leaving a round dozen of their number, either dead or badly wounded, behind them. —  Two Gallant Sons of Devon A Tale of the Days of Queen Bess
• All the members rose simultaneously, and expressed their joy by a loud shout, while one man, more zealous in his hatred than the rest, exclaimed, "_And Law himself, is he torn to pieces?_"[13 13] The Duchess of Orleans gives a different version of this story; but whichever be the true one, the manifestation of such feeling in a legislative assembly was not very creditable. —  Memoirs of Extraordinary Popular Delusions and the Madness of Crowds
• "Two men set out simultaneously, at different times, on a journey, both being unable to travel. —  Cricket at the Seashore
• At the whispered command of the officer the boat's crew backed water simultaneously, and brought the boat to a stand-still, just in time to avoid being run down by a dark mass that came swiftly, and with no lights showing, out toward the open sea. —  Across the Spanish Main A Tale of the Sea in the Days of Queen Bess

Roget's II: The New Thesaurus