earthenware jar vs jar

earthenware jar and jar both are nouns.

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

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

earthenware jar (noun)	jar (noun)
an earthen jar (made of baked clay)	a cylindrical vessel, typically used for storing food
	a sudden jarring impact
	the quantity contained in a jar

earthenware 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