subject case vs nominative case

subject case and nominative case both are nouns.

Word	Noun	Adjective	Verb	Adverb
subject case	Yes	No	No	No
nominative case	Yes	No	No	No

As nouns, subject case and nominative case are synonyms defined as:

subject case and nominative case: the category of nouns serving as the grammatical subject of a verb

Other synonyms of subject case include nominative.

subject case (noun)	nominative case (noun)
the category of nouns serving as the grammatical subject of a verb	the category of nouns serving as the grammatical subject of a verb