The congregation consisted chiefly of a few young folk, who snored sonorously.    From Wordnet, Princeton University. 

Adjective : a sonorous cavern. ,a sonorous speech.    From Dictionary.com. 

"Oblivion!" nodded Mr. Brimberly, mouthing the word sonorously.    From Wordnik.com.  [The Definite Object A Romance of New York] Reference

Leaning out of the window he called sonorously, "Woodman, spare that tree!".    From Wordnik.com.  [Mark Twain, a Biography. Complete] Reference

Leaning out of the window he called sonorously, “Woodman, spare that tree!”.    From Wordnik.com.  [Mark Twain: A Biography] Reference

"Did Nate gin ye a word fur me?" he called sonorously, above the clamor of the noisy bark-mill.    From Wordnik.com.  [Down the Ravine] Reference

She rolled out the titles sonorously, determined that if she was docked of dignity in one way she would have it in another.    From Wordnik.com.  [The Adventures of Akbar] Reference

Hearing Austin's name sonorously pronounced by the man of calves, he looked up from his book, and held out his hand.    From Wordnik.com.  [Ordeal of Richard Feverel — Complete] Reference

Leaning out of the window he called sonorously.    From Wordnik.com.  [Mark Twain, a Biography — Volume II, Part 1: 1886-1900] Reference

Alfred began to sing the runes, softly, sonorously.    From Wordnik.com.  [The Seventh Gate]

“Comrades!” began the black-browed man sonorously.    From Wordnik.com.  [Mother] Reference

He went on to the end, speaking carefully and sonorously.    From Wordnik.com.  [The Worshippers] Reference

Lynch smote himself sonorously on the chest and said: —.    From Wordnik.com.  [A Portrait of the Artist as a Young Man] Reference

Ignatius Gallaher slapped his friend sonorously on the back.    From Wordnik.com.  [Dubliners] Reference

Babbitt was to be heard sonorously agreeing with the once-hated.    From Wordnik.com.  [Babbit] Reference

“Prepare yourself, dear Lady Newhaven,” he said sonorously.    From Wordnik.com.  [Red Pottage] Reference

So did the sonorously musical accent that flavored her Videssian.    From Wordnik.com.  [Bridge of the Separator]

The deep bass, purely mental voice tolled sonorously in his head.    From Wordnik.com.  [The Chrome Borne]

She thought that she knew how it went though, slowly and sonorously.    From Wordnik.com.  [To the Lighthouse] Reference

A hideous ormolu clock ticked sonorously in the center of the mantel.    From Wordnik.com.  [The Kaisho]

Somewhere a clock with an enormous pen - dulum was ticking sonorously.    From Wordnik.com.  [Second Skin]

The voices of the talking Cossacks vibrated more sonorously than before.    From Wordnik.com.  [The Cossacks] Reference

"Now, girls," she said sonorously, "do take him onward to his next stop.".    From Wordnik.com.  [Knight Of Ghosts And Shadows]

Before the words had left my lips a deep voice aloft sonorously proclaimed.    From Wordnik.com.  [The Mutineers] Reference

"The shortcut to power, the easy road to pre-eminence," he repeated sonorously.    From Wordnik.com.  [The First Man in Rome]

Little by little the baroness fell asleep, and presently began to snore sonorously.    From Wordnik.com.  [Une Vie] Reference

Anne-Marie let herself go, and her voice rang quite sonorously through the classroom.    From Wordnik.com.  [Fifth Formers at St. Clare's]

I'm expected to present the facts as sonorously as I can and move on to the next story.    From Wordnik.com.  [Woodchuck Chumley: I, Woodchuck Chumley] Reference

Metropolitan Museum moved majestically past, echoing sonorously to the rush of the cab.    From Wordnik.com.  [The Beautiful and Damned] Reference

'Tis the voice of PUNCHINELLO wafting sonorously from his tower the instructive moral.    From Wordnik.com.  [Punchinello, Volume 1, No. 01, April 2, 1870] Reference

The herald sonorously announced that Mr. So-and-so would now respond to his Right Honorable.    From Wordnik.com.  [The Atlantic Monthly, Volume 12, No. 70, August, 1863] Reference

Her arched eyebrows rose with nervous twitches and her deep contralto voice rolled sonorously.    From Wordnik.com.  [Miss Pat at Artemis Lodge] Reference

Articulation should be clear, and the words formed sonorously, and from the stomach, as it were.    From Wordnik.com.  [Papers on Health] Reference

He still, however, rapped sonorously on my box, shaking his head from side to side like a china mandarin.    From Wordnik.com.  [Lippincott's Magazine of Popular Literature and Science, Vol. 12, No. 32, November, 1873] Reference

Do you not understand that we were sonorously beating our own drum when the Onondaga Giant was a mere baby?.    From Wordnik.com.  [Punchinello, Volume 1, No. 04, April 23, 1870] Reference

Her voice sounded less sonorously in the offices where she gave an order; her energetic nature seemed subdued.    From Wordnik.com.  [The French Immortals Series — Complete] Reference