Echo
Part of speech: noun
Definition: A reflected sound that is heard again by its initial observer. The displaying on the command line of the command that has just been executed. The letter E in the ICAO spelling alphabet.
Part of speech: verb
Definition: To reflect off of a surface and return to someone who has heard it already. To repeat back precisely what another has just said: to copy in the imitation of a natural echo. To repeat (another's speech, opinion etc.).
Example sentence: I don't like to talk much with people who always agree with me. It is amusing to coquette with an echo for a little while, but one soon tires of it.
Repeat
Part of speech: verb
Definition: To do or say again (and again).
Part of speech: noun
Definition: An iteration, a repetition.A rerun, something that has been done before.
Example sentence: You have no choice as a professional chef: you have to repeat, repeat, repeat, repeat until it becomes part of yourself. I certainly don't cook the same way I did 40 years ago, but the technique remains. And that's what the student needs to learn: the technique.