oregano vs wild marjoram

oregano and wild marjoram both are nouns.

Word	Noun	Adjective	Verb	Adverb
oregano	Yes	No	No	No
wild marjoram	Yes	No	No	No

As nouns, oregano and wild marjoram are synonyms defined as:

Other synonyms of oregano include marjoram, Origanum vulgare, pot marjoram, winter sweet.

oregano (noun)	wild marjoram (noun)
pungent leaves used as seasoning with meats and fowl and in stews and soups and omelets	aromatic Eurasian perennial
aromatic Eurasian perennial