grape jelly vs jelly

grape jelly and jelly both are nouns.

Word	Noun	Adjective	Verb	Adverb
grape jelly	Yes	No	No	No
jelly	Yes	No	Yes	No

As nouns, jelly is a hypernym of grape jelly; that is, jelly is a word with a broader meaning than grape jelly:

grape jelly (noun)	jelly (noun)
jelly made from grape juice	a preserve made of the jelled juice of fruit
	an edible jelly (sweet or pungent) made with gelatin and used as a dessert or salad base or a coating for foods
	any substance having the consistency of jelly or gelatin

grape jelly (verb)	jelly (verb)
	make into jelly