Ballota nigra vs stinking horehound

Ballota nigra and stinking horehound both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ballota nigra	Yes	No	No	No
stinking horehound	Yes	No	No	No

As nouns, Ballota nigra and stinking horehound are synonyms defined as:

Ballota nigra and stinking horehound: ill-smelling European herb with rugose leaves and whorls of dark purple flowers

Other synonyms of Ballota nigra include black archangel, black horehound, fetid horehound.

Ballota nigra (noun)	stinking horehound (noun)
ill-smelling European herb with rugose leaves and whorls of dark purple flowers	ill-smelling European herb with rugose leaves and whorls of dark purple flowers