This is the 2444th most frequent Catalan word.
relacionats
"Relacionats" means "related" in English.
In this sentence, 'relacionats' operates as past participle functioning as an adjective to specify documents that are associated with the mentioned project.
Els documents relacionats amb el projecte estan en aquest arxiu.
The documents related to the project are in this file.
Here, 'relacionats' again functions as an adjective describing the topics linked with the environment, illustrating its attributive usage.
Els temes relacionats amb l'ambient interessen molta gent.
The topics related to the environment interest many people.
In this case, 'relacionats' appears as part of a verbal structure (estar relacionats) indicating that the specified concepts share a connection.