slop-seller vs bargainer

slop-seller and bargainer both are nouns.

Word	Noun	Adjective	Verb	Adverb
slop-seller	Yes	No	No	No
bargainer	Yes	No	No	No

As nouns, bargainer is a hypernym of slop-seller; that is, bargainer is a word with a broader meaning than slop-seller:

slop-seller: a dealer in cheap ready-made clothing
bargainer: someone who purchases and maintains an inventory of goods to be sold

Other hypernyms of slop-seller include dealer, monger, trader.

slop-seller (noun)	bargainer (noun)
a dealer in cheap ready-made clothing	someone who purchases and maintains an inventory of goods to be sold
	negotiator of the terms of a transaction