Majorana hortensis vs knotted marjoram

Majorana hortensis and knotted marjoram both are nouns.

Word	Noun	Adjective	Verb	Adverb
Majorana hortensis	Yes	No	No	No
knotted marjoram	Yes	No	No	No

As nouns, Majorana hortensis and knotted marjoram are synonyms defined as:

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

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

Majorana hortensis (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