blurriness vs fogginess

blurriness and fogginess both are nouns.

Word	Noun	Adjective	Verb	Adverb
blurriness	Yes	No	No	No
fogginess	Yes	No	No	No

As nouns, blurriness and fogginess are synonyms defined as:

blurriness and fogginess: the quality of being indistinct and without sharp outlines

Other synonyms of blurriness include fuzziness, indistinctness, softness.

blurriness (noun)	fogginess (noun)
the quality of being indistinct and without sharp outlines	the quality of being indistinct and without sharp outlines
	an atmosphere in which visibility is reduced because of a cloud of some substance