This is the 17986th most frequent Polish word.
śpiwory
Sleeping bags.
Here, 'śpiworów' is the plural genitive form of 'śpiwory', used to express that the photos depict various models of sleeping bags.
Zdjęcia pokazują różne modele śpiworów.
The photos show different models of sleeping bags.
In this sentence, 'śpiwory' is the plural nominative form, referring to the sleeping bags that were stored.
Śpiwory schowano do szafek po wyjeździe.
The sleeping bags were stored in the cabinets after the trip.
Here, 'śpiworów' is in the plural genitive case, indicating a quantity aspect (more sleeping bags being needed).