work vs pit

work and pit both are nouns.

Word	Noun	Adjective	Verb	Adverb
work	Yes	No	Yes	No
pit	Yes	No	Yes	No

As nouns, pit is a hyponym of work; that is, pit is a word with a more specific, narrower meaning than work:

work: a place where work is done
pit: a workplace consisting of a coal mine plus all the buildings and equipment connected with it

work (noun)	pit (noun)
activity directed toward making or doing something	a surface excavation for extracting stone or slate
the occupation for which you are paid	a workplace consisting of a coal mine plus all the buildings and equipment connected with it
a product produced or accomplished through the effort or activity or agency of a person or thing	a trap in the form of a concealed hole
a place where work is done	lowered area in front of a stage where an orchestra accompanies the performers
the total output of a writer or artist (or a substantial part of it)	(auto racing) an area at the side of a racetrack where the race cars are serviced and refueled
applying the mind to learning and understanding a subject (especially by reading)	(commodity exchange) the part of the floor of a commodity exchange where trading in a particular commodity is carried on
(physics) a manifestation of energy; the transfer of energy from one physical system to another expressed as the product of a force and the distance through which it moves a body in the direction of that force	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)

work (verb)	pit (verb)
give a workout to	remove the pits from
arrive at a certain condition through repeated motion	set into opposition or rivalry
go sour or spoil	mark with a scar
cause to undergo fermentation
find the solution to (a problem or question) or understand the meaning of
use or manipulate to one's advantage
to mix into a homogeneous mass
perform as expected when applied
move into or onto
shape, form, or improve a material
cause to happen or to occur as a consequence
prepare for crops
make something, usually for a specific function
gratify and charm, usually in order to influence
proceed along a path
move in an agitated manner
provoke or excite
be employed
cause to work
exert oneself by doing mental or physical work for a purpose or out of necessity; work
have an effect or outcome; often the one desired or expected
operate in a certain place, area, or specialty
proceed towards a goal or along a path or through an activity
have and exert influence or effect
operate in or through
cause to operate or function
behave in a certain way when handled