liquefaction vs physical change

liquefaction and physical change both are nouns.

Word	Noun	Adjective	Verb	Adverb
liquefaction	Yes	No	No	No
physical change	Yes	No	No	No

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

liquefaction: the conversion of a solid or a gas into a liquid
physical change: a change from one state (solid or liquid or gas) to another without a change in chemical composition

Other hypernyms of liquefaction include phase change, phase transition, state change.

liquefaction (noun)	physical change (noun)
the conversion of a solid or a gas into a liquid	a change from one state (solid or liquid or gas) to another without a change in chemical composition