A useful test here is whether each word can slot directly after "he is ___" to describe a person.
Three of the words slot in as direct personal descriptions, while megalomania needs an entirely different sentence structure because it names a condition, not a trait. That makes megalomania the odd word.
Fish : Shoal :: Lion : _________
Select the correct option to complete the analogy.
Eject : Insert :: Advance : \(\underline{\hspace{1cm}}\) (By word meaning)