difference between AIM-PURPOSE, PRECISE-ACCURATE

could you tell me the difference between PRECISE and ACCURATE, AIM and PURPOSE, thanks for each answer :)

I suggest using a dictionary:-)

I've already used the dictionary and to be honest the definitions given didn't help me. Those pairs of words occured in CAE tests and I didn't manage to distinguish the difference. Please help me:)

aim-a purpose that you are hoping to achieve
purpose-what you want to achieve when you do sth
so???:(
precise-exact and correct in every detail
accurate-exactly correct