This is the 8464th most frequent Polish word.
pomarańcza
Orange (fruit).
Here 'pomarańcze' is used in plural form to refer to the fruit in general.
Lubię świeże pomarańcze na śniadanie.
I like fresh oranges for breakfast.
In this sentence, 'pomarańczy' is in genitive singular form, indicating the juice made from an orange.
Sok z pomarańczy jest zdrowy.
Orange juice is healthy.
The word 'pomarańcza' is in nominative singular, identifying a specific orange located on the table.