sirenian mammal vs sirenian

sirenian mammal and sirenian both are nouns.

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

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

sirenian mammal and sirenian: any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs

Other synonyms of sirenian mammal include sea cow.

sirenian mammal (noun)	sirenian (noun)
any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs	any of two families of large herbivorous aquatic mammals with paddle-shaped tails and flipper-like forelimbs and no hind limbs