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: mode of transportation 
Words: train, spider, wave, fly, drive
spider

Category: boxing terminology 
Words: deck, gunwale, level, tko, jab
gunwale

Category: kitchenware 
Words: plate, spatula, glass, translucent fabric, knive

translucent fabric