Ask at the forum if you have an Ancient or Modern Greek query!
P. σπηλαῖον, τό (Plato), Ar. and V. ἄντρον, τό, αὔλιον, τό, V. θαλάμαι, αἱ, P. and V. σῆραγξ, ἡ (Plato, Phaedo. 110A and Sophocles, Fragment).
γλάφυ, γύαλον, κατῶρυξ, πέτρα, σπέος, σπήλαιον, σπῆλυγξ