Thanks. Since you have that sentence copied verbatim into the list above, might I suggest that I think you have an extra indefinite article in it? :-)
You could probably drop those last three words and achieve the same effect: "Someone challenges my use." Or, if that is too poetic for you, "Someone challenges my usage."
Forgive me for adding yet another non sequitur to another response to you (I blame the late hour for the fuzzier focus) but I notice that you mention "dictionary" in your list, but not Google. I use browser word lookup a lot. Being able to just type a word in the address bar and get a definition back as a top result has really changed the way I write (and maybe not always for the better). It isn't just that there is the internet available. I remember back in the day (with the Internet, capital I!) it took me an hour with Alta Vista to find the definition and etymology of the word "skosh".