phase transition vs state change

phase transition and state change both are nouns.

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

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

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

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

phase transition (noun)	state change (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