shlockmeister vs merchant

shlockmeister and merchant both are nouns.

Word	Noun	Adjective	Verb	Adverb
shlockmeister	Yes	No	No	No
merchant	Yes	No	No	No

As nouns, merchant is a hypernym of shlockmeister; that is, merchant is a word with a broader meaning than shlockmeister:

shlockmeister: (slang) a merchant who deals in shoddy or inferior merchandise
merchant: a businessperson engaged in retail trade

Other hypernyms of shlockmeister include merchandiser.

shlockmeister (noun)	merchant (noun)
(slang) a merchant who deals in shoddy or inferior merchandise	a businessperson engaged in retail trade