sky burial vs funeral

sky burial and funeral both are nouns.

Word	Noun	Adjective	Verb	Adverb
sky burial	Yes	No	No	No
funeral	Yes	No	No	No

As nouns, funeral is a hypernym of sky burial; that is, funeral is a word with a broader meaning than sky burial:

sky burial: a traditional Tibetan funeral ritual in which the corpse is exposed to the open air to be eaten by sacred vultures
funeral: a ceremony at which a dead person is buried or cremated

Other hypernyms of sky burial include obsequy.

sky burial (noun)	funeral (noun)
a traditional Tibetan funeral ritual in which the corpse is exposed to the open air to be eaten by sacred vultures	a ceremony at which a dead person is buried or cremated