entombment vs interment

entombment and interment both are nouns.

Word	Noun	Adjective	Verb	Adverb
entombment	Yes	No	No	No
interment	Yes	No	No	No

As nouns, entombment and interment are synonyms defined as:

Other synonyms of entombment include burial, inhumation, sepulture.

entombment (noun)	interment (noun)
the ritual placing of a corpse in a grave	the ritual placing of a corpse in a grave