tacamahac vs poplar

tacamahac and poplar both are nouns.

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

As nouns, poplar is a hypernym of tacamahac; that is, poplar is a word with a broader meaning than tacamahac:

tacamahac: poplar of northeastern North America with broad heart-shaped leaves
poplar: any of numerous trees of north temperate regions having light soft wood and flowers borne in catkins

Other hypernyms of tacamahac include poplar tree.

tacamahac (noun)	poplar (noun)
poplar of northeastern North America with broad heart-shaped leaves	any of numerous trees of north temperate regions having light soft wood and flowers borne in catkins
	soft light-colored non-durable wood of the poplar