sepulture vs sepulcher

sepulture and sepulcher both are nouns.

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

As nouns, sepulture and sepulcher are synonyms defined as:

Other synonyms of sepulture include burial chamber, sepulchre.

sepulture (noun)	sepulcher (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