mountain beaver vs sewellel

mountain beaver and sewellel both are nouns.

Word	Noun	Adjective	Verb	Adverb
mountain beaver	Yes	No	No	No
sewellel	Yes	No	No	No

As nouns, mountain beaver and sewellel are synonyms defined as:

mountain beaver and sewellel: bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent

Other synonyms of mountain beaver include Aplodontia rufa.

mountain beaver (noun)	sewellel (noun)
bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent	bulky nocturnal burrowing rodent of uplands of the Pacific coast of North America; the most primitive living rodent