Jell-O vs gelatin dessert

Jell-O and gelatin dessert both are nouns.

Word	Noun	Adjective	Verb	Adverb
Jell-O	Yes	No	No	No
gelatin dessert	Yes	No	No	No

As nouns, gelatin dessert is a hypernym of Jell-O; that is, gelatin dessert is a word with a broader meaning than Jell-O:

Jell-O: fruit-flavored dessert (trade mark Jell-O) made from a commercially prepared gelatin powder
gelatin dessert: jellied dessert made with gelatin and fruit juice or water

Other hypernyms of Jell-O include hydrocolloid.

Jell-O (noun)	gelatin dessert (noun)
fruit-flavored dessert (trade mark Jell-O) made from a commercially prepared gelatin powder	jellied dessert made with gelatin and fruit juice or water