clouding up vs evaporation

clouding up and evaporation both are nouns.

Word	Noun	Adjective	Verb	Adverb
clouding up	Yes	No	No	No
evaporation	Yes	No	No	No

As nouns, evaporation is a hypernym of clouding up; that is, evaporation is a word with a broader meaning than clouding up:

Other hypernyms of clouding up include vapor, vaporisation, vaporization, vapour.

clouding up (noun)	evaporation (noun)
the process whereby water particles become visible in the sky	the process of becoming a vapor
	the process of extracting moisture