bay-rum tree vs Pimenta acris

bay-rum tree and Pimenta acris both are nouns.

Word	Noun	Adjective	Verb	Adverb
bay-rum tree	Yes	No	No	No
Pimenta acris	Yes	No	No	No

As nouns, bay-rum tree and Pimenta acris are synonyms defined as:

Other synonyms of bay-rum tree include bayberry, Jamaica bayberry, wild cinnamon.

bay-rum tree (noun)	Pimenta acris (noun)
West Indian tree; source of bay rum	West Indian tree; source of bay rum