I think spellcheck is entitled to its opinion. I used to do a lot of writing about research, wherein a significant part
of the vocabulary was simply too new for spellcheck to have caught up to it. It was "correct," inasmuch as the
scientist naming the effect, phenomenon, whatever, had spelled the word, and I had spelled it the same way.
So when spellcheck helped me out, often as not, I'd just smile and leave it be. Take it up with Dr. Brilliant,
spellcheck, and don't bother me with it. Actually, some of the words were in medical or the newest science
dictionaries, but not in spellcheck. Language is malleable and continually evolving and transforming itself. That's
why it's good to stick to the tried and true routines and habits, so we don't all become unintelligible to each other.