You are, of course, absolutely correct. I meant the verb but spelled it as a noun. Fortunately, I didn't have to go back and count posts. The vivid purple rendering of what I had written at the top of your post caused my error to become instantly apparent. I don't proof read or 'spell check' much these days. In fact, I don't even know how to use spell check on this computer, and in any case this kind of error would probably not have been picked up through that process. More serious is my failure to proof read. Looking back at old posts I often find missing words, missing letters, and the remnants of sentences that I had meant to remove entirely but which, like malevolent ghosts, continue to exist in the form of a word or two, a fragment that should have been deleted with the rest, making some sentences virtually meaningless.
It's interesting how the brain repairs what we have written. It knows what we meant to write and makes some errors invisible.