Den
Part of speech: noun
Definition: The home of certain animals. A comfortable room not used for formal entertaining.
Part of speech: verb
Definition: To ensconce or hide oneself in (or as in) a den.
Example sentence: If I'm filming 'Dragons' Den', we work flat out until 8pm, although I love seeing the weird, wonderful and plain delusional.
Cave
Part of speech: verb
Definition: To surrender.To collapse.To hollow out or undermine.To engage in the recreational exploration of caves; to spelunk.In room-and-pillar mining, to extract a deposit of rock by breaking down a pillar which had been holding it in place.To work over tailings to dress small pieces of marketable ore.
Part of speech: noun
Definition: A large, naturally-occurring cavity formed underground, or in the face of a cliff or a hillside.A hole, depression, or gap in earth or rock, whether natural or man-made.A storage cellar, especially for wine or cheese.A place of retreat, such as a man cave.A naturally-occurring cavity in bedrock which is large enough to be entered by an adult.A shielded area where nuclear experiments can be carried out.Debris, particularly broken rock, which falls into a drill hole and interferes with drilling.A collapse or cave-in.The vagina.A group that breaks from a larger political party or faction on a particular issue.
Part of speech: interjection
Definition: look out!; beware!