I don't know what you mean by "similar,"
but both the creation of
trademarks and the creation of a remedy for trademark dilution are
both part of the Trademark Act of 1946 (aka Title 15, Chapter 22, of
the United States Code). Registration of trademarks is Sec. 1051, and
the prohibition of dilution is in Sec. 1125. Your statement here is
at best incoherent, and at worst simply incorrect. See generally
http://www.fda.gov/opacom/laws/trademrk.htm
The way I see it, trademark dilution law is one part of trademark law,
but it is a part that is more restrictive on freedom of speech than
the rest. I think that's the point Anthony was trying to make.