Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: animal 
Words: flutter, swim, ant, fly, bats
flutter

Category: weather 
Words: stormy, make the grade, sunny, texture, fair
texture

Category: emotional status 
Words: jealous, nervous, books, content, panicked

books