advis r

Earlier, I typed in "faculty advisor" and Google Chrome red squiggly lined the word "advisor" so I changed it to "adviser", which did not get red squiggly lined. But "adviser" just doesn't look right and I've been second guessing every word I've spelled since. I googled it, though, and it looks like "advisor" and "adviser" are interchangeable. Correct me if I'm wrong.