Are you
suggesting that the content presented in
http://en.wiktionary.org/wiki/nigger or another dictionary's "nigger"
entry is comparable (or could be comparable, given revision/expansion
in accordance with the publication's standards) to that of
http://en.wikipedia.org/wiki/Nigger ?
It isn't comparable. Could it be comparable? I don't know.
By the way, how does that article and the article on [[black people]]
not violate "Articles whose titles are different words for the same
thing (synonyms): are duplicate articles that should be merged."
Because one of the unwritten exceptions to the guideline is that
articles on terms which shouldn't be used in encyclopedias (without
the quotation marks or italics) don't count.