Picea engelmannii vs Engelmann spruce

Picea engelmannii and Engelmann spruce both are nouns.

Word	Noun	Adjective	Verb	Adverb
Picea engelmannii	Yes	No	No	No
Engelmann spruce	Yes	No	No	No

As nouns, Picea engelmannii and Engelmann spruce are synonyms defined as:

Picea engelmannii and Engelmann spruce: tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes

Other synonyms of Picea engelmannii include Engelmann's spruce.

Picea engelmannii (noun)	Engelmann spruce (noun)
tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes	tall spruce of Rocky Mountains and British Columbia with blue-green needles and acutely conic crown; wood used for rough lumber and boxes