I had a similar 'problem' but I really don't think I am very smart. In 4th grade I was reading at the top level of the 6th graders. Other kids would call me bookworm, 'walking dictionary' and told me to 'be human!'

I did it less but certainly kept using richer words with the friends that I knew would understand.

Just recently I sent mail to a work colleague with the content

   For your edification.

He was amused when he looked up the meaning of edification :-)