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: dump truck, tackle, crane, hoist, davit
dump truck

Category: poker 
Words: ring, deck, blind, cards, joker
ring

Category: temperature 
Words: unruffled, refreshing, cool, mild, freezing

unruffled