Difference between Propagation Time and Propagation Delay

Question

I have found several answers to Propagation Delay but none come up when we talk about Propagation time. Are they the same thing?

Propagation Delay:

propagation delay is the amount of time it takes for the head of the signal to travel from the sender to the receiver. wiki

Answer 1

i am not sure but propagation time should be the propagation delay plus the time to generate the bit at the sender and store the bit at the receiver.