murk vs fog

murk and fog both are nouns.

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

As nouns, murk and fog are synonyms defined as:

murk and fog: an atmosphere in which visibility is reduced because of a cloud of some substance

Other synonyms of murk include fogginess, murkiness.

murk (noun)	fog (noun)
an atmosphere in which visibility is reduced because of a cloud of some substance	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

murk (verb)	fog (verb)
make dark, dim, or gloomy	make less visible or unclear