Rochelle salt vs Rochelle salts

Rochelle salt and Rochelle salts both are nouns.

Word	Noun	Adjective	Verb	Adverb
Rochelle salt	Yes	No	No	No
Rochelle salts	Yes	No	No	No

As nouns, Rochelle salt and Rochelle salts are synonyms defined as:

Rochelle salt and Rochelle salts: a double salt used in Seidlitz powder; acts as a cathartic

Other synonyms of Rochelle salt include potassium sodium tartrate.

Rochelle salt (noun)	Rochelle salts (noun)
a double salt used in Seidlitz powder; acts as a cathartic	a double salt used in Seidlitz powder; acts as a cathartic