pinniped mammal vs pinnatiped

pinniped mammal and pinnatiped both are nouns.

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

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

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

Other synonyms of pinniped mammal include pinniped.

pinniped mammal (noun)	pinnatiped (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