fogginess vs faintness

fogginess and faintness both are nouns.

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

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

Other hyponyms of fogginess include dimness, vagueness.

fogginess (noun)	faintness (noun)
the quality of being indistinct and without sharp outlines	the quality of being dim or lacking contrast
an atmosphere in which visibility is reduced because of a cloud of some substance	barely audible
	the property of being without strength
	the trait of lacking boldness and courage
	a feeling of faintness and of being ready to swoon