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: nutritional value 
Words: heavy, protein, fat, sugars, area
area

Category: date status 
Words: postponed, timely, early, current, jetstream
jetstream

Category: bird 
Words: crane, flamingo, winch, swallow, ostrich

winch