saliency vs visibility

saliency and visibility both are nouns.

Word	Noun	Adjective	Verb	Adverb
saliency	Yes	No	No	No
visibility	Yes	No	No	No

As nouns, visibility is a hyponym of saliency; that is, visibility is a word with a more specific, narrower meaning than saliency:

Other hyponyms of saliency include conspicuousness, profile.

saliency (noun)	visibility (noun)
the state of being salient	quality or fact or degree of being visible; perceptible by the eye or obvious to the eye
	capability of providing a clear unobstructed view
	degree of exposure to public notice