He is calling upon his friends for help.

The crowd erupted in a chorus of cat-calls as the performer took the stage.

He would often cat-call women on the street.

I cold called several potential clients yesterday.

I received a phantom call last night.

I am re-calling my childhood memories.

The call originators are responsible for initiating phone calls.

I received several call backs for the job interview.

The call-boys are responsible for delivering messages and packages.

The call trees in the forest provide shelter for many birds.