being, resembling, or suggestive of a cavern

a vast, cavernous room.

deep-set

cavernous eyes.

hollow and deep-sounding

a cavernous voice.

containing caverns.

full of small cavities; porous.

adjective

filled

adjective

alveolate , broad , chambered , chasmal , commodious , concave , curved inward , deep , deep-set , echoing , gaping , huge , resonant , reverberant , roomy , sepulchral , socketed , spacious , sunken , vast , wide , yawning , indented , abysmal , abyssal , hollow , immense