ἡ κέρκος τῇ ἀλώπεκι μαρτυρεῖ → you can tell a fox by its tail, small traits give the clue to the character of a person
P. σπηλαῖον, τό (Plato), Ar. and V. ἄντρον, τό, αὔλιον, τό, V. θαλάμαι, αἱ, P. and V. σῆραγξ, ἡ (Plato, Phaedo. 110A and Soph., Fragment).
γλάφυ, γύαλον, κατῶρυξ, πέτρα, σπέος, σπήλαιον, σπῆλυγξ