state change vs phase transition

state change and phase transition both are nouns.

Word	Noun	Adjective	Verb	Adverb
state change	Yes	No	No	No
phase transition	Yes	No	No	No

As nouns, state change and phase transition are synonyms defined as:

state change and phase transition: a change from one state (solid or liquid or gas) to another without a change in chemical composition

Other synonyms of state change include phase change, physical change.

state change (noun)	phase transition (noun)
a change from one state (solid or liquid or gas) to another without a change in chemical composition	a change from one state (solid or liquid or gas) to another without a change in chemical composition