pit vs car racing

pit and car racing both are nouns.

Word	Noun	Adjective	Verb	Adverb
pit	Yes	No	Yes	No
car racing	Yes	No	No	No

pit (noun)	car racing (noun)
a surface excavation for extracting stone or slate	the sport of racing automobiles
a workplace consisting of a coal mine plus all the buildings and equipment connected with it
a trap in the form of a concealed hole
lowered area in front of a stage where an orchestra accompanies the performers
(auto racing) an area at the side of a racetrack where the race cars are serviced and refueled
(commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
an enclosure in which animals are made to fight
(Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
a sizeable hole (usually in the ground)
the hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed
a concavity in a surface (especially an anatomical depression)

pit (verb)	car racing (verb)
remove the pits from
set into opposition or rivalry
mark with a scar