obviousness vs patency

obviousness and patency both are nouns.

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

As nouns, obviousness and patency are synonyms defined as:

obviousness and patency: the property of being easy to see and understand

Other synonyms of obviousness include noticeability, noticeableness.

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