shoreless

The thought was Norden's, reflected to Taylor from the shoreless depths of the energy brain.
The Whispering Spheres|Russell Robert Winterbotham
In ten minutes the Comfort was, to all appearances, alone on a shoreless sea, and I was the only living creature in the universe.
The Rise of Roscoe Paine|Joseph C. Lincoln
In her concrete material form this vessel, destined to navigate the shoreless Ocean of Space, is English.
A Honeymoon in Space|George Griffith
Beyond them, they thought, there was nothing but a vast expanse of water—a shoreless ocean—a mystery never to be solved.
Autobiography of Frank G. Allen, Minister of the Gospel|Frank G. Allen

The mountains are covered—a shoreless sea rolls round the world, and on its billows are billions of corpses.
The Works of Robert G. Ingersoll, Vol. 11 (of 12)|Robert G. Ingersoll

British Dictionary definitions for shoreless

shoreless

/ (ˈʃɔːlɪs) /

adjective

without a shore suitable for landing

poetic boundless; vastthe shoreless wastes

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012