A collocation is two or more words that often go together. These combinations just sound 'right' to native English speakers, who use them all the time. On the other hand, other combinations may be unnatural and just sound 'wrong'.
He loves fast food. - correct
He loves quick food. - not correct
In English, collocations are widely used and carry the meaning. It is also the way native speakers speak.
There are several different types of collocation made from combinations of verb, noun, and adjectives, and they are widely tested in the FCE.
It is important to notice how the verb after a collocation sometimes changes into the ING form.
Here is a list of some common collocations used for the FCE:
TAKE INTO ACCOUNT - CONSIDER
INSTEAD OF - IN PLACE OF
FAR AS I AM CONCERNED - IN MY OPINION
LOSE MY TEMPER - GET ANGRY
AT LEAST - AS A MINIMUM
KNOW HOW TO - BE ABLE TO
GET IN TOUCH WITH - CONTACT
GET USED TO - COMFORTABLE WITH
HAVE TROUBLE - FIND DIFFICULT
HAVE DIFFICULTY - HAVE PROBLEMS WITH
FIND YOUR WAY BACK - RETURN
MEAN TO - INTENTIONAL
MAKE ARRANGEMENTS FOR - FACILITATE
LIKE TO KNOW - UNDERSTAND
MAKE ANY SENSE - BE LOGICAL
PAY ATTENTION TO - FOCUS ON
WOULD YOU MIND - DO YOU CARE
NO POINT - UNNECESSARY
NO CHANCE - NO POSSIBILITY
NOTHING APART FROM - EXCEPT FOR
NOTHING LEFT - FINISHED
UNDER CONTROL - NOT FREE
NO DIFFERENCE BETWEEN - THE SAME
NO COMPARISON BETWEEN - DIFFERENT
FINISHED BY - THE LAST ACTION