apple jelly vs jelly

apple jelly and jelly both are nouns.

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

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

apple jelly (noun)	jelly (noun)
jelly made from apple 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

apple jelly (verb)	jelly (verb)
	make into jelly