timber rattlesnake vs Crotalus horridus horridus

timber rattlesnake and Crotalus horridus horridus both are nouns.

Word	Noun	Adjective	Verb	Adverb
timber rattlesnake	Yes	No	No	No
Crotalus horridus horridus	Yes	No	No	No

As nouns, timber rattlesnake and Crotalus horridus horridus are synonyms defined as:

timber rattlesnake and Crotalus horridus horridus: widely distributed in rugged ground of eastern United States

Other synonyms of timber rattlesnake include banded rattlesnake.

timber rattlesnake (noun)	Crotalus horridus horridus (noun)
widely distributed in rugged ground of eastern United States	widely distributed in rugged ground of eastern United States