He has arachnophobia, and he panics as soon as he sees a spider.

He has gephyrophobia, and is afraid of crossing bridges.

He avoids bright places because he has photophobia.

She suffers from agoraphobia and is afraid to go to open places.

She has zoophobia, and runs away as soon as she sees dogs or cats.

He has acrophobia, so he is not good at mountain climbing.

Have a good day at school, son.

When her son goes to school, the mother always says 'see you later'.

Well then, I'm off.

He was going back and forth between the office and home all day.