In looking up an article of mine I noticed a competing article using similar words but Google didn't differentiate any difference.
A search for "widget ideas" (my article) yielded other entries such as "widget tips" (competitor) but the word tips is highlighted even if ideas is searched for and not tips.
In short Google believes tips to be like ideas in the context I asked for. In some contexts they would not be similar at all, I don't think waiters appreciate ideas instead of tips anyway.
So is there a know list anywhere of which words Google considers the same as others? Surely some research has been done on this by now?