They are both continents whose names begin and end with "a", and have an "i" in the middle. Much the same as America, I guess. Or Antarctica
11 letter words that begin and end with the same letter:charismaticdisappeareddiscrediteddistributedgalvanizinggerminatingseriousnesstranslucenttransparent
There is no special word to describe an adjective and a noun that both begin with the same letter. They are simply an adjective and a noun that both begin with the same letter.
fossils
In Ireland there are no counties that start with the letter B. In other countries that have counties, there are ones that begin with B, like Berkshire and Buckinghamshire in England. There would be many counties in America that begin with B. The same could be said of many countries.
peep
Nine letter words that begin and end with the same letter:beachcombdartboarddecimateddecorateddecreaseddefrostedeffectiveeradicateetiquetteexecutivefireproofflagstafffoolproofgatheringgroundhoghairbrushhopscotchhundredthmagnesiummidstreamnarrationnewswomannightgownnutritionrainwaterrecruitersailboatssentencesturbulent
Alliteration
Abracadabra, agoraphobia, albuminuria, amphisbaena, antonomasia and astrocytoma are 11 letter words. They begin and end with the letter a.
Africa asia anarctica Europe australia
The main similarity is that each of the continents ends with the same letter with which it began, e.g. Asia, America, Australia, Europe etc.
trout