Added 10 October 2026 rusting noun Categories: ActionsRare Words noun ! Definition from WordNet 3.1, Princeton University. More about rusting at Wordnik → Where our words come from → The formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water. Related Words: subcriticalcorrosionpittingrustproofingcorrodingcrackingparkerizationanti-rustrusticizationrottingblue Back to today's word