fog vs foggy

fog is a noun but foggy is not a noun.

Word	Noun	Adjective	Verb	Adverb
fog	Yes	No	Yes	No
foggy	No	Yes	No	No

fog (noun)	foggy (noun)
confusion characterized by lack of clarity
droplets of water vapor suspended in the air near the ground
an atmosphere in which visibility is reduced because of a cloud of some substance

fog (adjective)	foggy (adjective)
	filled or abounding with fog or mist
	indistinct or hazy in outline
	stunned or confused and slow to react (as from blows or drunkenness or exhaustion)
	obscured by fog

fog (verb)	foggy (verb)
make less visible or unclear