I'm not sure how to word this exactly.
Basically I have a video game site that does a lot of "top ten" lists, and that is where I get a lot of my traffic from. I've noticed when checking in Google Webster tools that a lot of the searches that are bringing people to these top ten lists are not actually using the term "top" at all, but rather "best". So for instance I wrote a "Top 10 Mario Kart Tracks" article, and the search that is bringing people to it seems to be "best mario kart tracks".
I've noticed too that when I search in Google for "best mario kart tracks" not only does my article rank high, but "top" is bolded in the results, as if that was an actual search term used. It seems like maybe Google just considers these two terms to be the same?
So basically my question is... should I still be trying to work the term "best" into my titles for my top 10 lists and such since that a term that, apparently, a lot of people search on? Or does "top" count as "best" to Google and it would be a pointless addition? Because my title space is already kind of limited and "Top 10 Best Mario Kart Tracks" sounds pretty stupid to me, so I don't want to have to try to cram "best" in the title if it's not actually going to add anything to searches on the term "best" that "top" isn't already covering.
I'm using "best" and "top" as my example here, but really there are a ton of similar instances that I've come upon where a search for one term will bring up results with other terms bolded. So getting a sense of how exactly Google treats this kind of thing will help me a lot in figuring out how to get my keywords into what I write...