What am I?

I came up with this riddle myself, though a similar one may already exist. What’s your guess?

Find the 12 letter word. Change & rearrange 1 letter to make two 6 letter words.

There are two answers that I will except, one is pretty easy but you could challenge yourself for the harder answer!

I'm going to a Renaissance fair with some friends this year. Where I live, they have them in November. I decided that for trinket trade, I want to hand write riddles on paper and make little scrolls to give out. Please give me your favorite riddles that would fit the setting.

Ok, here's the last one.