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: bird 
Words: crane, pelican, egret, hummingbird, upraise
upraise

Category: social gathering 
Words: place, club, outing, lettuce, group
lettuce

Category: aesthetic characteristic 
Words: variety, fair, milky, sunny, tone

sunny