Antonyms of groan :
Examples of usage:
This took place on the 6th of the Ninth Month, about 20 minutes past 2, without sigh or groan, even as a lamb. "Memoir and Diary of John Yeardley, Minister of the Gospel", John Yeardley.
Then there was a groan which struck even Aby's ear; but Sir Thomas was still alive and listening, and so he went on. "Castle Richmond", Anthony Trollope.
Then I felt rather than heard the father's groan. "John Halifax, Gentleman", Dinah Maria Mulock Craik.