pit, cavity -- (a sizeable hole (usually in the ground); "they dug a pit to bury the body")
pit, fossa -- (a concavity in a surface (especially an anatomical depression))
stone, pit, endocarp -- (the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed; "you should remove the stones from prunes before cooking")
Hell, perdition, Inferno, infernal region, nether region, pit -- ((Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment; "Hurl'd headlong...To bottomless perdition, there to dwell"- John Milton; "a demon from the depths of the pit"; "Hell is paved with good intentions"-Dr. Johnson)
pit -- (an enclosure in which animals are made to fight)
pit -- ((commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on)
pit -- ((auto racing) an area at the side of a racetrack where the race cars are serviced and refueled)
pit, pitfall -- (a trap in the form of a concealed hole)
pit, quarry, stone pit -- (a surface excavation for extracting stone or slate; "a British term for `quarry' is `stone pit'")
orchestra pit, pit -- (lowered area in front of a stage where an orchestra accompanies the performers)
colliery, pit -- (a workplace consisting of a coal mine plus all the buildings and equipment connected with it)
Overview of verb pit
The verb pit has 3 senses
pit, oppose, match, play off -- (set into opposition or rivalry; "let them match their best athletes against ours"; "pit a chess player against the Russian champion"; "He plays his two children off against each other")
scar, mark, pock, pit -- (mark with a scar; "The skin disease scarred his face permanently")
pit, stone -- (remove the pits from; "pit plums and cherries")