Fact check needed, but doesn't 'corn' mean '[primary]staple', officially? So what Americans call 'corn' is technically Maize, according to that view. Somewhere else the 'corn' could be rice -- again on that view.

Edit: [1].definition#3> a cereal grass that is the primary crop of a region (such as wheat in Britain and oats in Scotland and Ireland)

[1] https://www.merriam-webster.com/dictionary/corn