Is GRE really required to get into a good university for MS in CS
There are a number of different exams that comprise the Graduate Record Examinations (GRE).  There is also the TOEFL exam, which may be required if English is not your first language.

Each university has its own set of requirements, and you will have to look on the websites for individual programs to find  out this information.  Here are the exams you may have to take:


The GRE General Test, comprised of three sections:


Verbal Reasoning (i.e., English reading and analysis skills)
Quantitative Reasoning (i.e., math skills)
Analytical Writing (i.e., English writing skills)

The GRE Subject Test, which (in your case) would be the Computer Science, but it looks like the computer science exam is being discontinued as of this month.


The bigger question is not necessarily which exams you have to take, but which exams will make a difference.  In computer science, your verbal and analytic writing score will count for much less than the quantitative score (which in some case is a shame, because analytical writing skills are very important for reading and writing papers...).


  What should be the right approach?



Study for the exams.  There are many online study guides and practice exams, and books to purchase.
Take it as many times as you can before applications are due.  This can get expensive.



  The problem is that I am not good at words


You'll need to work on that, and it is very possible to improve your skills and ability with hard work.


  ...plus I am not very passionate about learning them also.


You'll have to change this attitude if you want to be successful.


  I also feel that they should not really matter considering I want to do research work in the field of Computers.


As I said above, the quantitative exam will matter the most (and the CS exam will matter more if you take it).  The verbal and writing exams will matter, but you can afford to do worse on them than on the other exams.  Unfortunately, your personal feelings on the matter won't get you accepted, and you have to work within the system and do the best you can.