This is the 5305th most frequent Polish word.
samoloty
Airplanes.
The word 'samoloty' refers to 'airplanes' as the subject of the sentence, describing their action of flying.
Samoloty latają wysoko nad chmurami.
Airplanes fly high above the clouds.
The word 'samolotów' is used in its genitive plural form to describe the quantity seen at the airport.
Widzę wiele samolotów na lotnisku.
I see many airplanes at the airport.
'Samolotem' here is employed as the instrumental case singular to indicate the means of travel.