How can i give multiple users admin access?

I would like to give another user on my macbook pro admin access, so that they can install programs without having to ask me for the password each time. I do not want the password to be the same for my profile, because I don't want them getting into my account. So is it possible to have a separate password for admin use only? This might be a dumb question and I know their is probably a simple way to do this, but I'm new to macs so any help would be greatly appreciated. Thank you.