abalone vs ear-shell

abalone and ear-shell both are nouns.

Word	Noun	Adjective	Verb	Adverb
abalone	Yes	No	No	No
ear-shell	Yes	No	No	No

As nouns, abalone and ear-shell are synonyms defined as:

abalone and ear-shell: any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior

abalone (noun)	ear-shell (noun)
any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior	any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior