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.

Q: falsification, fib, invent, fudge, cupcake

A: cupcake
****
Q: ashamed, down, emotional upsets, disgusted, ground

A: ground
****
Q: car, swim, walk, train, fly

A:
swim
****