I was recently making a recording that included the word "academy," and wanting to be certain of where the stress was placed in that word, I looked it up. The sources I used indicated that it is spelled the same for both "academy" and "academia" and gives this spelling:
academia
Previously, I had thought "academy" stressed the "i" in the Spanish word and "academia" stressed the "e." I would feel more comfortable using this word if a native or fluent speaker could confirm this for me.