The Collaborative International Dictionary of English v.0.48:

Ironmonger \I"ron*mon`ger\, n.
   A dealer in iron or hardware.
   [1913 Webster]

WordNet (r) 3.0 (2006):

ironmonger
    n 1: someone who sells hardware; "in England they call a
         hardwareman an ironmonger" [syn: ironmonger,
         hardwareman]
    2: a store selling hardware; "in Great Britain they used to call
       a hardware store an ironmonger's shop" [syn: hardware
       store, ironmonger, ironmonger's shop]

Moby Thesaurus II by Grady Ward, 1.0:

31 Moby Thesaurus words for "ironmonger":
   baker, bookdealer, bookseller, butcher, chandler,
   clothing merchant, confectioner, draper, drysalter, fishmonger,
   fishwife, florist, footwear merchant, fruiterer, furnisher,
   furrier, greengrocer, grocer, groceryman, haberdasher, hardwareman,
   jeweler, liquor merchant, newsdealer, perfumer, poulterer, saddler,
   stationer, tobacconist, vintner, wine merchant



The Jargon File (version 4.4.7, 29 Dec 2003):

ironmonger
 n.

    [IBM] A hardware specialist (derogatory). Compare sandbender, polygon
    pusher.


The Free On-line Dictionary of Computing (30 December 2018):

ironmonger

   [IBM]  A hardware specialist (derogatory).  Compare
   sandbender, polygon pusher.

   [Jargon File]