haze over vs fog

haze over is not a noun while fog is a noun.

Word	Noun	Adjective	Verb	Adverb
haze over	No	No	Yes	No
fog	Yes	No	Yes	No

As verbs, haze over and fog are synonyms defined as:

Other synonyms of haze over include becloud, befog, cloud, mist, obnubilate, obscure.

haze over (noun)	fog (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

haze over (verb)	fog (verb)
make less visible or unclear	make less visible or unclear