oregano vs pot marjoram

oregano and pot marjoram both are nouns.

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

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

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

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