This is the 10068th most frequent Russian word.
аэродромы
Airfields.
Here, "аэродромы" is used in the nominative plural form and refers to a piece of land equipped for aircraft landing and takeoff.
На окраине города есть несколько заброшенных аэродромов.
On the outskirts of the city, there are several abandoned airfields.
In this sentence, "аэродромы" is again in the nominative plural form, emphasizing the subject being investigated.
Мы исследовали аэродромы, чтобы найти подходящее место для тренировки.
We researched the airfields to find a suitable place for practice.
"Аэродромов" in the genitive plural form indicates a relation or possession (the area around the airfields).