He has a serious Oedipus complex.

He is showing typical symptoms of the Oedipus complex.

I learned about the Electra complex in psychology class.

He is rumored to have a Lolita complex.

He is studying the Oedipus complex.

He thinks he can control everything, it's like a God complex.

She is rumored to have a brother complex.

He has a sister complex and is always worried about his younger sister.

A new arbor was built in the park.

He is obstinate, and once he decides something, he rarely changes it.