Acquaintance: somebody known or met before.
I'm contacting several of my acquaintances, to see if they know of any job opportunities.
I don't know him well, but he is an acquaintance of mine from a long time ago.
Appearance: how something looks, what something looks like.
He could improve his appearance by buying some new clothes.
He doesn't care about his appearance, so he doesn't make a good impression.
Consequence: an outcome or result.
Many forms of life will become extinct as a consequence of global warming.
One consequence of his drinking has been the poor quality of his work.
Factor: something that affects or influences the end result.
One factor that needs to be considered is his arrogant personality.
Her health is one factor we can't afford to ignore.
Exception: to be unique or treated differently.
Everyone has to be in the office before 9:00, with the exception of the sales department.
I'm sorry, but I can't make an exception and allow you to bring your dog to the office
