oxidation number vs oxidation state

oxidation number and oxidation state both are nouns.

Word	Noun	Adjective	Verb	Adverb
oxidation number	Yes	No	No	No
oxidation state	Yes	No	No	No

As nouns, oxidation number and oxidation state are synonyms defined as:

oxidation number and oxidation state: the degree of oxidation of an atom or ion or molecule; for simple atoms or ions the oxidation number is equal to the ionic charge

oxidation number (noun)	oxidation state (noun)
the degree of oxidation of an atom or ion or molecule; for simple atoms or ions the oxidation number is equal to the ionic charge	the degree of oxidation of an atom or ion or molecule; for simple atoms or ions the oxidation number is equal to the ionic charge