NPR Sunday Puzzle (Nov 17, 2013): Quarrel Synonyms:
Q: Think of a word meaning "quarrel" in which several of the letters appear more than once. Remove exactly two occurrences of every repeated letter, and the remaining letters can be rearranged to spell a new word meaning "quarrel." What are the two words?
I did not search my synonym list thoroughly enough the first time...
Edit: The first four words "I did not search..." start with I, D, N, S which are the pairs of letters that are removed.
A: MisUndERsTAndiNG --> ARGUMENT