objective case vs accusative case

objective case and accusative case both are nouns.

Word	Noun	Adjective	Verb	Adverb
objective case	Yes	No	No	No
accusative case	Yes	No	No	No

As nouns, objective case and accusative case are synonyms defined as:

objective case and accusative case: the case of nouns serving as the direct object of a verb

Other synonyms of objective case include accusative.

objective case (noun)	accusative case (noun)
the case of nouns serving as the direct object of a verb	the case of nouns serving as the direct object of a verb