vaporisation vs phase change

vaporisation and phase change both are nouns.

Word	Noun	Adjective	Verb	Adverb
vaporisation	Yes	No	No	No
phase change	Yes	No	No	No

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

vaporisation: the process of becoming a vapor
phase change: a change from one state (solid or liquid or gas) to another without a change in chemical composition

Other hypernyms of vaporisation include phase transition, physical change, state change.

vaporisation (noun)	phase change (noun)
annihilation by vaporizing something	a change from one state (solid or liquid or gas) to another without a change in chemical composition
the process of becoming a vapor