tartar emetic vs antimony potassium tartrate

tartar emetic and antimony potassium tartrate both are nouns.

Word	Noun	Adjective	Verb	Adverb
tartar emetic	Yes	No	No	No
antimony potassium tartrate	Yes	No	No	No

As nouns, tartar emetic and antimony potassium tartrate are synonyms defined as:

tartar emetic and antimony potassium tartrate: a poisonous colorless salt used as a mordant and in medicine

tartar emetic (noun)	antimony potassium tartrate (noun)
a poisonous colorless salt used as a mordant and in medicine	a poisonous colorless salt used as a mordant and in medicine