scrutiny vs post-mortem

scrutiny and post-mortem both are nouns.

Word	Noun	Adjective	Verb	Adverb
scrutiny	Yes	No	No	No
post-mortem	Yes	No	No	No

As nouns, post-mortem is a hyponym of scrutiny; that is, post-mortem is a word with a more specific, narrower meaning than scrutiny:

scrutiny: the act of examining something closely (as for mistakes)
post-mortem: an examination and dissection of a dead body to determine cause of death or the changes produced by disease

scrutiny (noun)	post-mortem (noun)
the act of examining something closely (as for mistakes)	an examination and dissection of a dead body to determine cause of death or the changes produced by disease
a prolonged intense look	discussion of an event after it has occurred