hackmatack vs balsam poplar

hackmatack and balsam poplar both are nouns.

Word	Noun	Adjective	Verb	Adverb
hackmatack	Yes	No	No	No
balsam poplar	Yes	No	No	No

As nouns, hackmatack and balsam poplar are synonyms defined as:

hackmatack and balsam poplar: poplar of northeastern North America with broad heart-shaped leaves

Other synonyms of hackmatack include Populus balsamifera, tacamahac.

hackmatack (noun)	balsam poplar (noun)
poplar of northeastern North America with broad heart-shaped leaves	poplar of northeastern North America with broad heart-shaped leaves