baked Alaska vs dessert

baked Alaska and dessert both are nouns.

Word	Noun	Adjective	Verb	Adverb
baked Alaska	Yes	No	No	No
dessert	Yes	No	No	No

As nouns, dessert is a hypernym of baked Alaska; that is, dessert is a word with a broader meaning than baked Alaska:

baked Alaska: cake covered with ice cream and meringue browned quickly in an oven
dessert: a dish served as the last course of a meal

Other hypernyms of baked Alaska include afters, sweet.

baked Alaska (noun)	dessert (noun)
cake covered with ice cream and meringue browned quickly in an oven	a dish served as the last course of a meal