Majorana hortensis vs origanum

Majorana hortensis and origanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Majorana hortensis	Yes	No	No	No
origanum	Yes	No	No	No

As nouns, origanum is a hypernym of Majorana hortensis; that is, origanum is a word with a broader meaning than Majorana hortensis:

Majorana hortensis: aromatic European plant native to Mediterranean and Turkey; not widespread in Europe
origanum: any of various fragrant aromatic herbs of the genus Origanum used as seasonings

Majorana hortensis (noun)	origanum (noun)
aromatic European plant native to Mediterranean and Turkey; not widespread in Europe	any of various fragrant aromatic herbs of the genus Origanum used as seasonings