inlet vs body of water

inlet and body of water both are nouns.

Word	Noun	Adjective	Verb	Adverb
inlet	Yes	No	No	No
body of water	Yes	No	No	No

As nouns, body of water is a hypernym of inlet; that is, body of water is a word with a broader meaning than inlet:

inlet: an arm off of a larger body of water (often between rocky headlands)
body of water: the part of the earth's surface covered with water (such as a river or lake or ocean)

Other hypernyms of inlet include water.

inlet (noun)	body of water (noun)
an opening through which fluid is admitted to a tube or container	the part of the earth's surface covered with water (such as a river or lake or ocean)
an arm off of a larger body of water (often between rocky headlands)