apparency vs patency

apparency and patency both are nouns.

Word	Noun	Adjective	Verb	Adverb
apparency	Yes	No	No	No
patency	Yes	No	No	No

As nouns, patency is a hypernym of apparency; that is, patency is a word with a broader meaning than apparency:

Other hypernyms of apparency include noticeability, noticeableness, obviousness.

apparency (noun)	patency (noun)
the property of being apparent	the openness (lack of obstruction) of a bodily passage or duct
	the property of being easy to see and understand