massasauga vs rattlesnake

massasauga and rattlesnake both are nouns.

Word	Noun	Adjective	Verb	Adverb
massasauga	Yes	No	No	No
rattlesnake	Yes	No	No	No

As nouns, rattlesnake is a hypernym of massasauga; that is, rattlesnake is a word with a broader meaning than massasauga:

massasauga: pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians
rattlesnake: pit viper with horny segments at the end of the tail that rattle when shaken

Other hypernyms of massasauga include rattler.

As nouns, rattlesnake is a hypernym of massasauga; that is, rattlesnake is a word with a broader meaning than massasauga:

massasauga: small pygmy rattlesnake
rattlesnake: pit viper with horny segments at the end of the tail that rattle when shaken

Other hypernyms of massasauga include rattler.

massasauga (noun)	rattlesnake (noun)
pygmy rattlesnake found in moist areas from the Great Lakes to Mexico; feeds on mice and small amphibians	pit viper with horny segments at the end of the tail that rattle when shaken
small pygmy rattlesnake