dealer vs ironmonger

dealer and ironmonger both are nouns.

Word	Noun	Adjective	Verb	Adverb
dealer	Yes	No	No	No
ironmonger	Yes	No	No	No

As nouns, ironmonger is a hyponym of dealer; that is, ironmonger is a word with a more specific, narrower meaning than dealer:

dealer: someone who purchases and maintains an inventory of goods to be sold
ironmonger: someone who sells hardware

dealer (noun)	ironmonger (noun)
a firm engaged in trading	a store selling hardware
a seller of illicit goods	someone who sells hardware
the person who distributes the playing cards in a card game
someone who purchases and maintains an inventory of goods to be sold
the major party to a financial transaction at a stock exchange; buys and sells for his own account