inhumation vs interment

inhumation and interment both are nouns.

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

As nouns, inhumation and interment are synonyms defined as:

Other synonyms of inhumation include burial, entombment, sepulture.

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