The actual full title of the UK is "United Kingdom of Great Britain and Northern Ireland", so your example would be like accepting "Republic" for the Bolivarian Republic of Venezuela.
would you accept "the grenadines" on a quiz called countries starting with "t"? I doubt it. Same with countries starting with an h. (Bosnia) herzegovina would not be a valid answer.
Are we getting repetitive yet?
Say you were talking to a friend about the United Kingdom, and they just called it "Wales" or "Northern Ireland?" That wouldn't make sense, would it?
Another case: Say you were talking about Brunei. If they called it "Negara" or "Darussalam" you'd be confused, would you not?
The point is that "Tobago" is not a common shorthand of Trinidad and Tobago, similar to the fact that "And" is not a common shorthand for Antigua and Barbuda.
Naboo is a planet in Star Wars🙃🤣
The more nfo there is in your head, sometimes, the more stuff wants to come out..
Bursting at the seams.. "C.." "Colombia: ow ow ow me me !" "no..... capitals starting with c..." "Colombia: ow.."