I have looked many places but it is hard for me to find a complete answer. What I would like to know is if I had a main keyword say Cool Blue Widgets that is my emd.org, and my homepage content supports this keyword, will it also help rank for Blue Widgets? For that matter, will it also help rank the singular version Blue Widget. And also since I am using many variations of long tailed keywords, my keyword density for the simplest version, say Widgets, is very high like above 20%. Is this ok? Thanks everyone for any help I can get!