ambrosia vs dessert

ambrosia and dessert both are nouns.

Word	Noun	Adjective	Verb	Adverb
ambrosia	Yes	No	No	No
dessert	Yes	No	No	No

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

Other hypernyms of ambrosia include afters, sweet.

ambrosia (noun)	dessert (noun)
(classical mythology) the food and drink of the gods; mortals who ate it became immortal	a dish served as the last course of a meal
fruit dessert made of oranges and bananas with shredded coconut
any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
a mixture of nectar and pollen prepared by worker bees and fed to larvae