proctoscopy vs endoscopy

proctoscopy and endoscopy both are nouns.

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

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

proctoscopy: visual examination of the rectum and the end of the colon by means of a proctoscope
endoscopy: visual examination of the interior of a hollow body organ by use of an endoscope

proctoscopy (noun)	endoscopy (noun)
visual examination of the rectum and the end of the colon by means of a proctoscope	visual examination of the interior of a hollow body organ by use of an endoscope