Mason jar vs jar

Mason jar and jar both are nouns.

Word	Noun	Adjective	Verb	Adverb
Mason jar	Yes	No	No	No
jar	Yes	No	Yes	No

As nouns, jar is a hypernym of Mason jar; that is, jar is a word with a broader meaning than Mason jar:

Mason jar (noun)	jar (noun)
a glass jar with an air-tight screw top; used in home canning	a cylindrical vessel, typically used for storing food
	a sudden jarring impact
	the quantity contained in a jar

Mason jar (verb)	jar (verb)
	place in a cylindrical vessel
	affect in a disagreeable way
	move or cause to move with a sudden jerky motion
	shock physically
	be incompatible; be or come into conflict