Let's remember the industry standard on the term stretch...

Stretch is a temporary elongation of an object, in this case..your bow string.

Creep, on the other hand is the permanent elongation of an object in this case, your string...

I know we all talk stretch rather than creep when talking strings so I thought I'd throw that in there for ya's....

Your string creeps with age, break in....etc...a rubber band stretches...