How to enable synonyms in word

I got the solution by adding more features of proofing:

Steps are like:

Go to Add/Remove programs select Ms Word version & click on change:

select ADD/ REMOVE FEATURES, then click CONTINUE...

then select OFFICE SHARED FEATURES:

in the list select PROOFING TOOLS

Select RUN ALL MY COMPUTER  & click NEXT or continue (in ms office 2013)

it will take couple of minutes for the installation .

click FINISH & now open word...

There you get the synonyms.

Njoy....