sepulture vs burial

sepulture and burial both are nouns.

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

As nouns, sepulture and burial are synonyms defined as:

Other synonyms of sepulture include entombment, inhumation, interment.

sepulture (noun)	burial (noun)
a chamber that is used as a grave	concealing something under the ground
the ritual placing of a corpse in a grave	the ritual placing of a corpse in a grave