Canadian hemlock vs eastern hemlock

Canadian hemlock and eastern hemlock both are nouns.

Word	Noun	Adjective	Verb	Adverb
Canadian hemlock	Yes	No	No	No
eastern hemlock	Yes	No	No	No

As nouns, Canadian hemlock and eastern hemlock are synonyms defined as:

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

Other synonyms of Canadian hemlock include spruce pine, Tsuga canadensis.

Canadian hemlock (noun)	eastern hemlock (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