pinniped vs pinniped mammal

pinniped and pinniped mammal both are nouns.

Word	Noun	Adjective	Verb	Adverb
pinniped	Yes	No	No	No
pinniped mammal	Yes	No	No	No

As nouns, pinniped and pinniped mammal are synonyms defined as:

pinniped and pinniped mammal: aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers

Other synonyms of pinniped include pinnatiped.

pinniped (noun)	pinniped mammal (noun)
aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers	aquatic carnivorous mammal having a streamlined body specialized for swimming with limbs modified as flippers