funeral vs burial

funeral and burial both are nouns.

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

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

Other hyponyms of funeral include entombment, inhumation, interment, sepulture, sky burial.

funeral (noun)	burial (noun)
a ceremony at which a dead person is buried or cremated	concealing something under the ground
	the ritual placing of a corpse in a grave