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: consumer product 
Words: fearful, content, merchandise, shop, program
fearful

Category: social gathering 
Words: meeting, cinema, club, group, submarine
submarine

Category: bird 
Words: upraise, egret, heron, crane, davit

upraise