copepod crustacean vs copepod

copepod crustacean and copepod both are nouns.

Word	Noun	Adjective	Verb	Adverb
copepod crustacean	Yes	No	No	No
copepod	Yes	No	No	No

As nouns, copepod crustacean and copepod are synonyms defined as:

copepod crustacean and copepod: minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish

copepod crustacean (noun)	copepod (noun)
minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish	minute marine or freshwater crustaceans usually having six pairs of limbs on the thorax; some abundant in plankton and others parasitic on fish