clouding up vs vaporisation

clouding up and vaporisation both are nouns.

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

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

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

clouding up (noun)	vaporisation (noun)
the process whereby water particles become visible in the sky	annihilation by vaporizing something
	the process of becoming a vapor