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: ocean 
Words: signal, timely, brine, flow, current
timely

Category: weather 
Words: raining, sunny, fair, ghostly, windy
ghostly

Category: nutritional value 
Words: fat, protein, bulky, sugar, calcium

bulky

