I couldn't find a way to vote to remove the synonym, that was why I posted it here.
Google Docs is what Google calls their online office suite.
Google Documents is what Google calls their online word processor, which is a part of the online document suite.
Considering Google has rebranded Google Docs to Google Drive, the synonym for Google Docs to Google Drive is the correct one. Refer this previous meta post:
I was wrong. I thought that Google Docs is abbreviation of Google Document which was wrong.
As the wikipedia states:
Documents, spreadsheets, presentations can be created with Google Docs, imported through the web interface, or sent via email.