To include synonyms option like ms word

[Vijayalakshmi5E3C]

As most of us read many books or articles through pdf or adobe reader, we find some difficult word and we have to search in the net or in another source to find its meaning, it will be good if we have synonym dictionary in pdf, it helps users to get the meaning for the required word their itself rather than navigating to another source to find it, this can be added as an inbuilt option to provide alternative terms.