inlet vs cove

inlet and cove both are nouns.

Word	Noun	Adjective	Verb	Adverb
inlet	Yes	No	No	No
cove	Yes	No	No	No

As nouns, cove is a hyponym of inlet; that is, cove is a word with a more specific, narrower meaning than inlet:

Other hyponyms of inlet include fiord, fjord, loch.

inlet (noun)	cove (noun)
an opening through which fluid is admitted to a tube or container	a small inlet
an arm off of a larger body of water (often between rocky headlands)	small or narrow cave in the side of a cliff or mountain