Trainer or instructor?

[ahlam1399]

Noticing a number of posts on here use the word ?trainer?. Is this a modern day term? I have always called the person who came to teach/help/give me lessons an ?Instructor?. Is there a difference? Confused!

أكثر... (http://www.horseandhound.co.uk/forums/showthread.php?758207-Trainer-or-instructor&goto=newpost)