Synonyms of the word

cave

• n. A large, naturally-occurring cavity formed underground, or in the face of a cliff or a hillside.
• n. A hole, depression, or gap in earth or rock, whether natural or man-made.
• n. A storage cellar, especially for wine or cheese.
• n. A place of retreat, such as a man cave.
• n. (caving) A naturally-occurring cavity in bedrock which is large enough to be entered by an adult.
• n. (nuclear physics) A shielded area where nuclear experiments can be carried out.
• n. (drilling, uncountable) Debris, particularly broken rock, which falls into a drill hole and interferes…
• n. (mining) A collapse or cave-in.
• n. (figuratively, also slang) The vagina.
• n. (slang, politics, often "Cave") A group that breaks from a larger political party or faction on a particular…
• n. (obsolete) Any hollow place, or part; a cavity.
• v. To surrender.
• v. To collapse.
• v. To hollow out or undermine.
• v. To engage in the recreational exploration of caves; to spelunk.
• v. (mining) In room-and-pillar mining, to extract a deposit of rock by breaking down a pillar which had been…
• v. (mining, obsolete) To work over tailings to dress small pieces of marketable ore.
• v. (obsolete) To dwell in a cave.
• interj. (Britain, school slang) look out!; beware!

explore

• v. (intransitive, obsolete) To seek for something or after someone.
• v. (transitive) To examine or investigate something systematically.
• v. (transitive) To travel somewhere in search of discovery.
• v. (intransitive, medicine) To examine diagnostically.
• v. (transitive) To (seek) experience first hand.
• v. (intransitive) To be engaged exploring in any of the above senses.
• v. (intransitive) To wander without any particular aim or purpose.
• v. (transitive) To seek sexual variety, to sow one's wild oats.
• n. (colloquial) An exploration; a tour of a place to see what it is like.

formation

• n. Something possessing structure or form.
• n. The act of assembling a group or structure.
• n. (geology) A rock or face of a mountain.
• n. (military) A grouping of military units or smaller formations under a command, such as a brigade, division,…
• n. (military) An arrangement of moving troops, ships, or aircraft, such as a wedge, line abreast, or echelon…
• n. (sports) An arrangement of players designed to facilitate certain plays.
• n. The process of influencing or guiding a person to a deeper understanding of a particular vocation.
• n. The process during which something comes into being and gains its characteristics.

hollow

• n. A small valley between mountains.
• n. A sunken area or unfilled space in something solid; a cavity, natural or artificial.
• n. (US) A sunken area.
• n. (figuratively) A feeling of emptiness.
• v. (transitive) to make a hole in something; to excavate.
• adj. (of something solid) Having an empty space or cavity inside.
• adj. (of a sound) Distant, eerie; echoing, reverberating, as if in a hollow space; dull, muffled; often low-pitched.
• adj. (figuratively) Without substance; having no real or significant worth; meaningless.
• adj. (figuratively) Insincere, devoid of validity; specious.
• adj. concave; gaunt; sunken.
• adj. (gymnastics) pertaining to hollow body position.
• adv. (colloquial) Completely, as part of the phrase beat hollow or beat all hollow.
• v. To urge or call by shouting; to hollo.
• interj. Alternative form of hollo.

spelunk

• n. (obsolete) A cave, cavern or grotto.
• v. To explore caves.

undermine

• v. To dig underneath (something), to make a passage or for destructive or military purposes; to sap.
• v. (figuratively) To weaken or work against; to hinder, sabotage.