quarry vs gravel pit

quarry and gravel pit both are nouns.

Word	Noun	Adjective	Verb	Adverb
quarry	Yes	No	Yes	No
gravel pit	Yes	No	No	No

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

Other hyponyms of quarry include chalk pit, chalkpit.

quarry (noun)	gravel pit (noun)
animal hunted or caught for food	a quarry for gravel
a surface excavation for extracting stone or slate
a person who is the aim of an attack (especially a victim of ridicule or exploitation) by some hostile person or influence

quarry (verb)	gravel pit (verb)
extract (something such as stones) from or as if from a quarry