Cancer magister vs Dungeness crab

Cancer magister and Dungeness crab both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cancer magister	Yes	No	No	No
Dungeness crab	Yes	No	No	No

As nouns, Cancer magister and Dungeness crab are synonyms defined as:

Cancer magister and Dungeness crab: small edible crab of Pacific coast of North America

Cancer magister (noun)	Dungeness crab (noun)
small edible crab of Pacific coast of North America	small edible crab of Pacific coast of North America
	flesh of Cancer magister (Dungeness crab)