Time pass and Pastime

Time pass is both an activity and a review.....of that activity.

Works both ways.

What are you doing?
"Time pass"
How was the show?
"Oh timepass"
How did you feel about the show?
"Like the passage of time "

Pastime is a whole different thing.

Its a hobby...Its something you do to pass the time..

"My pastime is writing actually"
And people are like,
"Well, we read your writing and its timepass"