Below are two separate puzzles, but you will need to solve both to find the one-word answer.
I think the answer is
Reading the unused letters in the wordsearch backwards gives TRANSPARENT which clues overlaying the wordsearch locators on the crossword (the wordsearch is a transparent overlay). This gives the following result
Now rearranging the uncrossed letters give NATIONALISM
Thanks to Mathgeek for suggesting overlaying the images in the comments.
2 down in the crossword
This is about the alphabetical neighbours and not the physical ones.