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.

[EX Q]: Category: bird 
Words: goose, hoist, neck, swallow, crane
[EX A]: hoist

[EX Q]: Category: social gathering 
Words: club, bar, dance hall, discothek, roll
[EX A]: roll

[EX Q]: Category: aesthetic characteristic 
Words: dull, neat, classy, fine, wispy
[EX A]:
wispy