The following four and five letter words are hidden in the consecutive names of bordering countries. Using the hidden word as a clue, name the two countries.
eg. "ONCE" = CameroON CEntral African Republic
Can be as few as one letter per bordering country
The beginning of the hidden word will always be the end of the first country's name, and the end of the hidden word will always be the beginning of the second country's name
If you say "The two countries must border each other on a map" : a few more words, but maybe a little clearer as an instruction (that it is not just writing the names next to each other).