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: weather 
Words: brisk, unprejudiced, fair, endure, clime
unprejudiced

Category: animal 
Words: goat, stingray, tiger, hike, fish
hike

Category: mode of transportation 
Words: jog, flap, fly, bee, bus

bee