HI, I’m rather new to editing in Audacity. I have taken on a project that requires me to record some audio from various movies, and then edit the audio down to single words. Then, use those single words to make new sentences. I was wondering how I could approach this problem. Specifically, the actor I’m using is Morgan Freeman. I have taken audio from Through The Wormhole, Seven, and The Shawshank Redemption. If anyone could point me in the right direction with this project, that would be great. 
Try to match the volumes (best done by ear). Use the Amplify effect to adjust the volumes.
Then, use a [u]crossfade[/u] where the words splice together. The crossfade should probably be on the order of 1/10th of second or so.
You’ll probably never get anything that sounds natural. We don’t pause between words so it’s often difficult to isolate a word and keep the entire word while eliminating the sounds from the preceding & following words. Then, the intonation varies depending on where the word is in the sentence, if the word is emphasized, if it’s a question, etc. If you take dialog from different movies (or different parts of the same movie) you’ll have different background sounds & music, and probably a different “character” to the voice and overall sound.
Sometimes you can edit/sensor a word or phrase out of a sentence and get acceptable natural-sounding results. Or, you can generally chop-out a whole sentence. But, moving words around like you can do in a word processor just doesn’t work “nicely”.