muffin man vs pedlar

muffin man and pedlar both are nouns.

Word	Noun	Adjective	Verb	Adverb
muffin man	Yes	No	No	No
pedlar	Yes	No	No	No

As nouns, pedlar is a hypernym of muffin man; that is, pedlar is a word with a broader meaning than muffin man:

muffin man: formerly an itinerant peddler of muffins
pedlar: someone who travels about selling his wares (as on the streets or at carnivals)

Other hypernyms of muffin man include hawker, packman, peddler, pitchman.

muffin man (noun)	pedlar (noun)
formerly an itinerant peddler of muffins	someone who travels about selling his wares (as on the streets or at carnivals)