cavern
Sometimes, in names and especially by show-cave owners to impress intending visitors; but the normal word in anyy English-language caving speech or text is simply "Cave" irrespective of type and dimensions.
A cave system - as simple as that. :-) Sometimes the system is named as So-&-So Cavern, especially if part of it has been modified to form a show-cave, but the formal and most used term is still "cave".
Cave entrances are typically called cave mouths, cave openings, or cave portals.
The top of a cave is called the entrance or the mouth of the cave. It is the opening through which one can access the interior of the cave.
The opening is called the cave entrance or cave mouth. It is usually an "exit" formed by flowing water.
The roof of a cave is referred to as the "ceiling" or "overhang".
cave
A cave system - as simple as that. :-) Sometimes the system is named as So-&-So Cavern, especially if part of it has been modified to form a show-cave, but the formal and most used term is still "cave".
Carlsbad Caverns.
The Sarawak Chamber is the largest known cave chamber in the world. The Sarawak Chamber is a cave that is located underground in the country of Malaysia.
Cave entrances are typically called cave mouths, cave openings, or cave portals.
An entrance to a cave is called a cave mouth or cave opening.
A grotto is a large cave-like area, often next to water.
Cave.
A cave system - as simple as that. :-) Sometimes the system is named as So-&-So Cavern, especially if part of it has been modified to form a show-cave, but the formal and most used term is still "cave".
Cave in.
The top of a cave is called the entrance or the mouth of the cave. It is the opening through which one can access the interior of the cave.
I think it is called Zeus' cave ;)