oregano vs marjoram

oregano and marjoram both are nouns.

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

As nouns, oregano and marjoram are synonyms defined as:

oregano and marjoram: pungent leaves used as seasoning with meats and fowl and in stews and soups and omelets

As nouns, oregano and marjoram are synonyms defined as:

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

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