Origanum majorana vs knotted marjoram

Origanum majorana and knotted marjoram both are nouns.

Word	Noun	Adjective	Verb	Adverb
Origanum majorana	Yes	No	No	No
knotted marjoram	Yes	No	No	No

As nouns, Origanum majorana and knotted marjoram are synonyms defined as:

Origanum majorana and knotted marjoram: aromatic European plant native to Mediterranean and Turkey; not widespread in Europe

Other synonyms of Origanum majorana include Majorana hortensis, sweet marjoram.

Origanum majorana (noun)	knotted marjoram (noun)
aromatic European plant native to Mediterranean and Turkey; not widespread in Europe	aromatic European plant native to Mediterranean and Turkey; not widespread in Europe