evaporation vs vapour

evaporation and vapour both are nouns.

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

As nouns, evaporation and vapour are synonyms defined as:

Other synonyms of evaporation include vapor, vaporisation, vaporization.

evaporation (noun)	vapour (noun)
the process of becoming a vapor	the process of becoming a vapor
the process of extracting moisture	a visible suspension in the air of particles of some substance