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.
One example: Category: construction 
Words: excavator, crane, pelican, hoist, upraise
Solution is here: pelican
Explanation: A pelican is not related to construction because it is a type of bird.

Now, solve this: Category: construction 
Words: davit, crane, upraise, winch, davit
Solution:
davit