A five letter country name with the second letter 'a' is Japan.
There is no country whose second letter is V.
Some four letter words with second letter U and fourth letter O are:autoeurojudokudoouzo
Star, stat, stop, stir, and step are some four letter words with the second letter 't'
WIND
Some four letter words with a second letter U are:auraburncurbcuredulldumbeurofundguruhugejumpjunklumpluremuchmutenudeoustpullpurepushrulerumpruinruserushrustsuchsurftune
dyes
open
Noel (Christmas) is one holiday with four letters.
Rwanda is a country. The 2nd letter is w and the last letter is the letter a.
Haul and laud are four letter words. The 2nd letter is a. The 3rd letter is u.
Some four-letter words with the second letter "o" include: book, food, foot, pool, look, loop, cool, and soon. These words all have the commonality of having the letter "o" as the second letter in their spelling.