Neotoma fuscipes vs pack rat

Neotoma fuscipes and pack rat both are nouns.

Word	Noun	Adjective	Verb	Adverb
Neotoma fuscipes	Yes	No	No	No
pack rat	Yes	No	No	No

As nouns, pack rat is a hypernym of Neotoma fuscipes; that is, pack rat is a word with a broader meaning than Neotoma fuscipes:

Neotoma fuscipes: host to Lyme disease tick (Ixodes pacificus) in northern California
pack rat: any of several bushy-tailed rodents of the genus Neotoma of western North America; hoards food and other objects

Other hypernyms of Neotoma fuscipes include bushytail woodrat, Neotoma cinerea, packrat, trade rat.

Neotoma fuscipes (noun)	pack rat (noun)
host to Lyme disease tick (Ixodes pacificus) in northern California	any of several bushy-tailed rodents of the genus Neotoma of western North America; hoards food and other objects
	someone who collects things that have been discarded by others