sepulture vs sepulchre

sepulture and sepulchre both are nouns.

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

As nouns, sepulture and sepulchre are synonyms defined as:

Other synonyms of sepulture include burial chamber, sepulcher.

sepulture (noun)	sepulchre (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