knotted marjoram vs Origanum majorana

knotted marjoram and Origanum majorana both are nouns.

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

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

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

Other synonyms of knotted marjoram include Majorana hortensis, sweet marjoram.

knotted marjoram (noun)	Origanum majorana (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