This is the 4979th most frequent Swedish word.
bruins
The Swedish word "bruins" does not exist; you may have meant something else.
Here, 'bruna' (brown) combined with 'björnar' (bears) is used to describe the type of bears. The concept 'bruins' refers to 'brown bears' in English and can be similarly used.
Det finns många olika arter av björnar, inklusive bruna björnar.
There are many different species of bears, including brown bears.
In this context, 'Bruins' is the proper noun name of an ice hockey team, carrying the representation from the word 'brown bears' without further translation directly.
Boston Bruins är ett populärt ishockeylag i NHL.
The Boston Bruins are a popular NHL hockey team.
Here, 'bruna björnar' (brown bears) is used to describe actual animals, while 'Bruins' connects the animal's name to the hockey team's name metaphorically.