No, because it is not until Shakespeare used the word, in 1609 in his play, Pericles, that it enters the written language.
I know this because I checked with my (online) Oxford Unabridged Dictionary of the English Language (referenced often as the OED).
Does it matter in your writing? I suppose the answer is yes and no. Would you have an ancient Briton look out upon a Roman Legion for the first time and mutter, “Totally awesome.” I think not. However, no one will clap you into jail if you do. Still, if you love words—I do—I think it makes a difference.
Obviously, I do not check every word.
Nonetheless, my own rule for this is that if I can use a key word from the time about which I am writing, which is self-explanatory, I will use it. Thus in City of Orphans, a teenager is described as “pout-mouthed.” Anyone who knows children will instantly understand this marvelous word, which was used around the turn of the Nineteenth Century. Since I stumbled upon it, I have used it in other works and in conversation. You are welcome to spread the word. Pout-mouthed. Totally awesome.
In my most recently published book, Sophia’s War, set in New York City during the American Revolution, I used some of the vocabulary current at that time. I even put a glossary of these words at the back of the book, such as “glowflies” (fireflies) or “pixie-led” (confused).
A current project, set in Fifteenth Century England, uses such words as “brainsick” for crazy, “misfortuned” for poor, and “dreariheaded,” for sad. They are accurate for the time. I think of these words as the spices and herbs one uses to flavor a stew, a word, I need caution you, that only enters the written English language in 1594.
Do not take me at my word. Check the OED.