Time for more instances of the homophone: a word pronounced the same as another but differing in meaning, whether spelled the same way or not, as heir and air.
1. metal (noun): a substance (such as gold, tin, or copper) that usually has a shiny appearance, is a good conductor of electricity and heat, can be melted, and is usually capable of being shaped
2. mettle (noun): a strength of spirit; ability to continue despite difficulties
Well, Iron Man had the metal—and
He had the mettle, too. The land
Was safer when that hero flew—
And people, feeling safer, knew
That Robert Downey, Jr. was
An acting superstar because
He made them love that metal man
Whose skin was iron (that was the plan),
Whose soul was soft as any saint’s—
We love that dude! We’ve no complaints!