Definitions:

1. extremely robust adjective
   • an iron constitution

Synonyms:

• branding iron
• cast-iron
• press
• smoothing iron

NearBy Words:

• iron-gray
• iron-grey
• iron-tree
• ironclad
• ironed
• ironic
• ironical
• ironically
• ironing
• ironist
• ironlike
• ironman
• ironmonger
• ironmongery
• irons
• ironshod
• ironside
• ironware
• ironweed
• ironwood
• ironwork
• ironworker
• ironworks
• irony