It depends on context and the specific terms in the domain. In your example, you'd be begging for trouble -- LucasFilm not only has a trademark on the term "Jedi" but has aggressively gone after perceived trademark infringement for all things 'Star Wars' related for decades. They even sued a government contractor in the 1980s for labeling the Strategic Defense Initiative "Star Wars." (they lost, but the fact that there is pretty much no one LF won't sue is the point here.)
Obviously you could be using the term "jedi" as a hypothetical, but the specific case is worth considering. Any domain name containing a term such as that one is going to likely be used for the obvious purpose -- to capitalise on the popularity of the term due to the related film -- and in any commercial context at all you will be asking for issues.
Frank
I think this is very interesting. The other day, I was just listening to someone on a radio program talking about the ridiculous aspect of copyright infringements. Don't get me wrong, intellectual property is well worth the fight to keep.
But what the guy was talking about on the program was,say 30 yrs,40, 50 years from now, if we have companies coming out every week etc,at what point does someone get there very name trademarked?Technically, We are already Incorporated for those that have a SSN.
Will there be any wiggle room for originality when we have things like 1000 youtube videos uploaded everyday(modest number).
Surely someone has thought of a HarryPotter type of story before J Rowland(name check?)
One lawyer basically said, one has to be found in "bad faith" when deciding if they intentionally meant to use a similar name.
It's almost like, it depends on how popular something is in order for there to be any weight in the legal repercussions. Surely, the word Jedi was around before Luc stoled the story, I mean borrowed from other ancient stories.