eastern hemlock vs Tsuga canadensis

eastern hemlock and Tsuga canadensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern hemlock	Yes	No	No	No
Tsuga canadensis	Yes	No	No	No

As nouns, eastern hemlock and Tsuga canadensis are synonyms defined as:

eastern hemlock and Tsuga canadensis: common forest tree of the eastern United States and Canada; used especially for pulpwood

Other synonyms of eastern hemlock include Canadian hemlock, spruce pine.

eastern hemlock (noun)	Tsuga canadensis (noun)
common forest tree of the eastern United States and Canada; used especially for pulpwood	common forest tree of the eastern United States and Canada; used especially for pulpwood