Aim or Purpose 
Aim or Purpose
1. Ways of saying what the aim or purpose of something is

aim to do something to try to achieve something:
set out to do something	to  try to  achieve something.  
You  use  set out  to do something especially when talking about someone's original aims when they start to do
something

in order to 

be intended to do something  if  something is intended to do  something, it is 
done for that purpose
be supposed to do something / be meant to do something - particular result or effect. 

2. Words meaning aim or purpose

aim 
purpose 
objective - business or politics:
 The policy has three main objectives: 
goal something that a person or organization hopes to achieve in the future, even though this may take a long time:
 It took Mandela over forty years to achieve his goal of a democratic South Africa.
target - the exact  result, often a number or an amount of something,
that a person or organization intends to achieve:
 to reach  its target of  (=achieve its target)
 He set himself the target of 

intention 

 Their intention was to. 
 She went to Hollywood with the intention of  (=that was the reason she went there)
 The reader can never be 100% sure of the writer's original intentions.

mission something that a person or organization hopes to achieve,
which they consider to be very important 
 Our mission is to 

the point the purpose of doing something and the reason why it is right or necessary:
 The point of the experiment is to .
 find it difficult to see the point of . (=they find it difficult to understand why it is necessary)
 missing the point. (=they failed to understand the most important purpose or reason for something)

ends	- the result that someone is trying  to  achieve,  when  this is bad or 
dishonest:
 Several politicians were accused of trying to exploit the situation for their own ends. 
(=use it in order to get advantages for themselves)
 The terrorists will do almost anything to achieve their ends.
