Hissingsid - 8:59 pm on Apr 26, 2012 (gmt 0)
@mh_and I don't think specific searches are usually tolerated here but interesting nevertheless.
The word World occurs and all of the US states so a synonym of World as well. (British irony) Reminds me of that map that says "Them" on every country except one that says "US".
In my niche there are a couple of sites for a search like widgets service . They are normally optimised for the word widgets but are over optimised for words that are a synonym of service and under optimised for the word service itself. Its almost as though they have turned the synonym dial full over so in this case the word "service" doesn't help your ranking at all only synonyms and close semantic matches count.