This is the 14558th most frequent Russian word.
патриотический
Patriotic.
In this sentence, 'патриотическое' is the neuter singular form of the adjective and is used to describe the word 'стихотворение' (poem), indicating its patriotic nature.
Он написал патриотическое стихотворение.
He wrote a patriotic poem.
Here, 'патриотическую' is the feminine singular form of the adjective, matching the noun 'акцию' (event) and showing that the action has a patriotic theme.
В школе организовали патриотическую акцию.
The school organized a patriotic event.
In this usage, 'патриотические' is the plural form of the adjective, used to describe 'темы' (topics), indicating that the discussions were centered around patriotic subjects.