(please don't go there and feed the spammers, thank you :-))
$ whois facebook.com FACEBOOK.COM.ZZZZZ.GET.LAID.AT.WWW.SWINGINGCOMMUNITY.COM from whois Server: whois.tucows.com FACEBOOK.COM.MORE.INFO.AT.WWW.BEYONDWHOIS.COM from whois Server: whois.instra.net FACEBOOK.COM.LOVED.BY.WWW.SHQIPHOST.COM from Whois Server: whois.onlinenic.com FACEBOOK.COM.KNOWS.THAT.THE.BEST.WEB.HOSTING.IS.NASHHOST.NET from Whois Server: whois.your-server.de FACEBOOK.COM.GET.ONE.MILLION.DOLLARS.AT.WWW.UNIMUNDI.COM from Whois Server: whois.PublicDomainRegistry.com
MICROSOFT.COM.WILL.BE.BEATEN.WITH.MY.SPANNER.NET MICROSOFT.COM.SHOULD.GIVE.UP.BECAUSE.LINUXISGOD.COM MICROSOFT.COM.OHMYGODITBURNS.COM MICROSOFT.COM.IS.A.STEAMING.HEAP.OF.FUCKING-BULLSHIT.NET
That's been around for more than 10 years, the reason is that whois is doing subtring matches.
Blackhat SEO stuff. Easy to fool google suggest also.
(please don't go there and feed the spammers, thank you :-))