jelly vs apple jelly

jelly and apple jelly both are nouns.

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

As nouns, apple jelly is a hyponym of jelly; that is, apple jelly is a word with a more specific, narrower meaning than jelly:

Other hyponyms of jelly include grape jelly.

jelly (noun)	apple jelly (noun)
a preserve made of the jelled juice of fruit	jelly made from apple juice
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

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