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: boats 
Words: deck, gunwale, queen, lifeline, bridge
queen

Category: boxing terminology 
Words: ring, lifeline, deck, punch, corner
lifeline

Category: widespread 
Words: general, common, normal, ubiquitous, admiral

admiral