table salt vs common salt

table salt and common salt both are nouns.

Word	Noun	Adjective	Verb	Adverb
table salt	Yes	No	No	No
common salt	Yes	No	No	No

As nouns, table salt and common salt are synonyms defined as:

table salt and common salt: white crystalline form of especially sodium chloride used to season and preserve food

Other synonyms of table salt include salt.

table salt (noun)	common salt (noun)
white crystalline form of especially sodium chloride used to season and preserve food	white crystalline form of especially sodium chloride used to season and preserve food
	a white crystalline solid consisting mainly of sodium chloride (NaCl)