Picea rubens vs yellow spruce

Picea rubens and yellow spruce both are nouns.

Word	Noun	Adjective	Verb	Adverb
Picea rubens	Yes	No	No	No
yellow spruce	Yes	No	No	No

As nouns, Picea rubens and yellow spruce are synonyms defined as:

Picea rubens and yellow spruce: medium-sized spruce of eastern North America; chief lumber spruce of the area; source of pulpwood

Other synonyms of Picea rubens include eastern spruce, red spruce.

Picea rubens (noun)	yellow spruce (noun)
medium-sized spruce of eastern North America; chief lumber spruce of the area; source of pulpwood	medium-sized spruce of eastern North America; chief lumber spruce of the area; source of pulpwood