This is the 6411th most frequent Turkish word.
adası
"Adası" means "its/her/his island" in English.
Here, 'adası' denotes an 'island' using its base meaning.
Ahmet, dünyanın diğer adası olan Avustralya'yı ziyaret etmek istiyor.
Ahmet wants to visit Australia, which is another island of the world.
In this case, 'adası' has a figurative meaning, relating to a namesake.
Benim adımın aynısı olan sınıf arkadaşım benim adası gibi oldu.
My classmate, who has the same name as me, has become like my name-sake.
This usage reflects possession and links to a specific piece of land identified as an 'island.'