sea-ear vs abalone

sea-ear and abalone both are nouns.

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

As nouns, abalone is a hypernym of sea-ear; that is, abalone is a word with a broader meaning than sea-ear:

sea-ear: an abalone found near the Channel Islands
abalone: any of various large edible marine gastropods of the genus Haliotis having an ear-shaped shell with pearly interior

Other hypernyms of sea-ear include ear-shell.

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