eared seal vs sea lion

eared seal and sea lion both are nouns.

Word	Noun	Adjective	Verb	Adverb
eared seal	Yes	No	No	No
sea lion	Yes	No	No	No

As nouns, sea lion is a hyponym of eared seal; that is, sea lion is a word with a more specific, narrower meaning than eared seal:

eared seal: pinniped mammal having external ear flaps and hind limbs used for locomotion on land; valued for its soft underfur
sea lion: any of several large eared seals of the northern Pacific related to fur seals but lacking their valuable coat

Other hyponyms of eared seal include fur seal, fur seal.

eared seal (noun)	sea lion (noun)
pinniped mammal having external ear flaps and hind limbs used for locomotion on land; valued for its soft underfur	any of several large eared seals of the northern Pacific related to fur seals but lacking their valuable coat