Holcus lanatus vs Yorkshire fog

Holcus lanatus and Yorkshire fog both are nouns.

Word	Noun	Adjective	Verb	Adverb
Holcus lanatus	Yes	No	No	No
Yorkshire fog	Yes	No	No	No

As nouns, Holcus lanatus and Yorkshire fog are synonyms defined as:

Holcus lanatus and Yorkshire fog: tall European perennial grass having a velvety stem; naturalized in United States and used for forage

Other synonyms of Holcus lanatus include velvet grass.

Holcus lanatus (noun)	Yorkshire fog (noun)
tall European perennial grass having a velvety stem; naturalized in United States and used for forage	tall European perennial grass having a velvety stem; naturalized in United States and used for forage