earless seal vs true seal

earless seal and true seal both are nouns.

Word	Noun	Adjective	Verb	Adverb
earless seal	Yes	No	No	No
true seal	Yes	No	No	No

As nouns, earless seal and true seal are synonyms defined as:

earless seal and true seal: any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers

Other synonyms of earless seal include hair seal.

earless seal (noun)	true seal (noun)
any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers	any of several seals lacking external ear flaps and having a stiff hairlike coat with hind limbs reduced to swimming flippers