TASK DEFINITION: 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.
PROBLEM: Category: emotional status 
Words: alright, alert, fine, detached, level

SOLUTION: level

PROBLEM: Category: ocean 
Words: current, early, water, brine, tide

SOLUTION: early

PROBLEM: Category: physical activity 
Words: plummet, tumble, equinox, bend, fall

SOLUTION:
equinox