TASK DEFINITION: Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
PROBLEM: bow, gunwale, crew, deck, blocking

SOLUTION: blocking

PROBLEM: slow, shut, close, beside, out of service

SOLUTION: beside

PROBLEM: flat, smooth, mountain, mansion, plain

SOLUTION:
mansion