embalmment vs preservation

embalmment and preservation both are nouns.

Word	Noun	Adjective	Verb	Adverb
embalmment	Yes	No	No	No
preservation	Yes	No	No	No

As nouns, preservation is a hypernym of embalmment; that is, preservation is a word with a broader meaning than embalmment:

embalmment: preservation (of a dead body) by treating with balsams and drugs and other chemicals
preservation: a process that saves organic substances from decay

embalmment (noun)	preservation (noun)
preservation (of a dead body) by treating with balsams and drugs and other chemicals	the activity of protecting something from loss or danger
	an occurrence of improvement by virtue of preventing loss or injury or other change
	a process that saves organic substances from decay
	the condition of being (well or ill) preserved