When it comes to profane words, I'd suggest registering them in .COM, .NET, and .ORG gTLDs only.
ccTLDs (country TLDs) and some newer gTLDs are potentially risky ...
The so-called "land of the free" United States censors profane words in its .US ccTLD, as the poster above mentioned - and I'll further add that I'm one of those folks who has a .US domain stuck in perpetual limbo - F*ckCensorship.US ... yes, really!
Ron