briny vs body of water

briny and body of water both are nouns.

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

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

briny: any very large body of (salt) water
body of water: the part of the earth's surface covered with water (such as a river or lake or ocean)

Other hypernyms of briny include water.

briny (noun)	body of water (noun)
any very large body of (salt) water	the part of the earth's surface covered with water (such as a river or lake or ocean)

briny (adjective)	body of water (adjective)
slightly salty (especially from containing a mixture of seawater and fresh water)