For an unknown reason DjAvatar mystifies us. There is no "official" one-word name of the Czech Republic. According to the Constitution and laws of the CR, the only official name is Česká republika (in English: the Czech Republic) Similarly like the only official name of the UK is: the United Kingdom of Great Britain and Northern Irland The simplifications like "the United Kingdom", "Great Britain" or even "England" are inaccurate for obvious reasons. BTW, the USA have no one-word name as well (if we don't count "Yewessay" as one word). To call them "America" or "the States" is inappropriate although common esp. in Europe.