common salt vs binary compound

common salt and binary compound both are nouns.

Word	Noun	Adjective	Verb	Adverb
common salt	Yes	No	No	No
binary compound	Yes	No	No	No

As nouns, binary compound is a hypernym of common salt; that is, binary compound is a word with a broader meaning than common salt:

common salt: a white crystalline solid consisting mainly of sodium chloride (NaCl)
binary compound: chemical compound composed of only two elements

common salt (noun)	binary compound (noun)
white crystalline form of especially sodium chloride used to season and preserve food	chemical compound composed of only two elements
a white crystalline solid consisting mainly of sodium chloride (NaCl)