heat of vaporization vs heat of vaporisation

heat of vaporization and heat of vaporisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
heat of vaporization	Yes	No	No	No
heat of vaporisation	Yes	No	No	No

As nouns, heat of vaporization and heat of vaporisation are synonyms defined as:

heat of vaporization and heat of vaporisation: heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature

heat of vaporization (noun)	heat of vaporisation (noun)
heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature	heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature