eastern cottontail vs Sylvilagus floridanus

eastern cottontail and Sylvilagus floridanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
eastern cottontail	Yes	No	No	No
Sylvilagus floridanus	Yes	No	No	No

As nouns, eastern cottontail and Sylvilagus floridanus are synonyms defined as:

eastern cottontail and Sylvilagus floridanus: widely distributed in United States except northwest and far west regions

eastern cottontail (noun)	Sylvilagus floridanus (noun)
widely distributed in United States except northwest and far west regions	widely distributed in United States except northwest and far west regions