hysteroscopy vs endoscopy

hysteroscopy and endoscopy both are nouns.

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

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

hysteroscopy: visual examination of the uterus and uterine lining using an endoscope inserted through the vagina
endoscopy: visual examination of the interior of a hollow body organ by use of an endoscope

hysteroscopy (noun)	endoscopy (noun)
visual examination of the uterus and uterine lining using an endoscope inserted through the vagina	visual examination of the interior of a hollow body organ by use of an endoscope