sepulcher vs sepulture

sepulcher and sepulture both are nouns.

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

As nouns, sepulcher and sepulture are synonyms defined as:

Other synonyms of sepulcher include burial chamber, sepulchre.

sepulcher (noun)	sepulture (noun)
a chamber that is used as a grave	a chamber that is used as a grave
	the ritual placing of a corpse in a grave