vaporisation vs vapour

vaporisation and vapour both are nouns.

Word	Noun	Adjective	Verb	Adverb
vaporisation	Yes	No	No	No
vapour	Yes	No	No	No

As nouns, vaporisation and vapour are synonyms defined as:

Other synonyms of vaporisation include evaporation, vapor, vaporization.

vaporisation (noun)	vapour (noun)
annihilation by vaporizing something	the process of becoming a vapor
the process of becoming a vapor	a visible suspension in the air of particles of some substance