termination vs change of state

termination and change of state both are nouns.

Word	Noun	Adjective	Verb	Adverb
termination	Yes	No	No	No
change of state	Yes	No	No	No

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

termination: the act of ending something
change of state: the act of changing something into something different in essential characteristics

termination (noun)	change of state (noun)
the act of ending something	the act of changing something into something different in essential characteristics
the end of a word (a suffix or inflectional ending or final morpheme)
something that results
a place where something ends or is complete
a coming to an end of a contract period