autopsy vs necropsy

autopsy and necropsy both are nouns.

Word	Noun	Adjective	Verb	Adverb
autopsy	Yes	No	Yes	No
necropsy	Yes	No	No	No

As nouns, autopsy and necropsy are synonyms defined as:

autopsy and necropsy: an examination and dissection of a dead body to determine cause of death or the changes produced by disease

Other synonyms of autopsy include PM, post-mortem, post-mortem examination, postmortem, postmortem examination.

autopsy (noun)	necropsy (noun)
an examination and dissection of a dead body to determine cause of death or the changes produced by disease	an examination and dissection of a dead body to determine cause of death or the changes produced by disease

autopsy (verb)	necropsy (verb)
perform an autopsy on a dead body; do a post-mortem