salt vs salinity

salt and salinity both are nouns.

Word	Noun	Adjective	Verb	Adverb
salt	Yes	Yes	Yes	No
salinity	Yes	No	No	No

As nouns, salt and salinity are synonyms defined as:

salt and salinity: the taste experience when common salt is taken into the mouth

Other synonyms of salt include saltiness.

salt (noun)	salinity (noun)
the taste experience when common salt is taken into the mouth	the relative proportion of salt in a solution
white crystalline form of especially sodium chloride used to season and preserve food	the taste experience when common salt is taken into the mouth
a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)

salt (adjective)	salinity (adjective)
(of speech) painful or bitter