tacamahac vs hackmatack

tacamahac and hackmatack both are nouns.

Word	Noun	Adjective	Verb	Adverb
tacamahac	Yes	No	No	No
hackmatack	Yes	No	No	No

As nouns, tacamahac and hackmatack are synonyms defined as:

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

Other synonyms of tacamahac include balsam poplar, Populus balsamifera.

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