salt merchant vs salter

salt merchant and salter both are nouns.

Word	Noun	Adjective	Verb	Adverb
salt merchant	Yes	No	No	No
salter	Yes	No	No	No

As nouns, salt merchant and salter are synonyms defined as:

salt merchant (noun)	salter (noun)
someone who makes or deals in salt	someone who makes or deals in salt
	someone who uses salt to preserve meat or fish or other foods