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: activity 
Words: divide, croquet, fritter, squander, spend
croquet

Category: accomodation 
Words: apartment, lined, house, condominium, flat
lined

Category: animal 
Words: climbing, goat, hamster, iguana, fish

climbing