obfuscation vs darkening

obfuscation and darkening both are nouns.

Word	Noun	Adjective	Verb	Adverb
obfuscation	Yes	No	No	No
darkening	Yes	Yes	No	No

As nouns, darkening is a hypernym of obfuscation; that is, darkening is a word with a broader meaning than obfuscation:

Other hypernyms of obfuscation include blackening.

obfuscation (noun)	darkening (noun)
the activity of obscuring people's understanding, leaving them baffled or bewildered	changing to a darker color
darkening or obscuring the sight of something
confusion resulting from failure to understand

obfuscation (adjective)	darkening (adjective)
	becoming dark or darker as from waning light or clouding over