endoscopy vs scrutiny

endoscopy and scrutiny both are nouns.

Word	Noun	Adjective	Verb	Adverb
endoscopy	Yes	No	No	No
scrutiny	Yes	No	No	No

As nouns, scrutiny is a hypernym of endoscopy; that is, scrutiny is a word with a broader meaning than endoscopy:

endoscopy: visual examination of the interior of a hollow body organ by use of an endoscope
scrutiny: the act of examining something closely (as for mistakes)

Other hypernyms of endoscopy include examination.

endoscopy (noun)	scrutiny (noun)
visual examination of the interior of a hollow body organ by use of an endoscope	the act of examining something closely (as for mistakes)
	a prolonged intense look