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: fawn, social, cub, kid, colt

A: social
****
Q: ecstatic, specialty, substance, content, merchandise

A: ecstatic
****
Q: duck, cat, stoop, swan, goose

A:
stoop
****