spike heath vs Bruckenthalia spiculifolia

spike heath and Bruckenthalia spiculifolia both are nouns.

Word	Noun	Adjective	Verb	Adverb
spike heath	Yes	No	No	No
Bruckenthalia spiculifolia	Yes	No	No	No

As nouns, spike heath and Bruckenthalia spiculifolia are synonyms defined as:

spike heath and Bruckenthalia spiculifolia: small evergreen mat-forming shrub of southern Europe and Asia Minor having stiff stems and terminal clusters of small bell-shaped flowers

spike heath (noun)	Bruckenthalia spiculifolia (noun)
small evergreen mat-forming shrub of southern Europe and Asia Minor having stiff stems and terminal clusters of small bell-shaped flowers	small evergreen mat-forming shrub of southern Europe and Asia Minor having stiff stems and terminal clusters of small bell-shaped flowers