thawing vs physical change

thawing and physical change both are nouns.

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

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

thawing: the process whereby heat changes something from a solid to 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 thawing include heating, warming, phase change, phase transition, state change.

thawing (noun)	physical change (noun)
warm weather following a freeze; snow and ice melt	a change from one state (solid or liquid or gas) to another without a change in chemical composition
the process whereby heat changes something from a solid to a liquid