energy level vs energy state

energy level and energy state both are nouns.

Word	Noun	Adjective	Verb	Adverb
energy level	Yes	No	No	No
energy state	Yes	No	No	No

As nouns, energy level and energy state are synonyms defined as:

energy level and energy state: a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules

energy level (noun)	energy state (noun)
a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules	a definite stable energy that a physical system can have; used especially of the state of electrons in atoms or molecules