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: chocolate food 
Words: cake, fudge, rich, invent, cream
invent

Category: bird 
Words: flamingo, crane, upraise, winch, goose
upraise

Category: date status 
Words: belated, blue, delayed, timely, current

blue