Is the word rebeldes the same in Brazilian and European Portuguese?

Yes

The word "rebeldes" is identical in meaning, spelling, grammar, and general usage in both Brazilian and Continental Portuguese. The only difference lies in pronunciation:

• Brazilian Portuguese: The pronunciation is more open and melodic. The final "e" is typically pronounced as a clear /i/ sound (rebel-dees), and the unstressed vowels are more distinct.
• Continental Portuguese: The pronunciation is more "clipped" or stress-timed. The final "e" is much more closed and often becomes nearly silent or extremely reduced, and the unstressed vowels in the middle of the word are also more shortened.

Brazilian Portuguese Examples

1. Os adolescentes estão muito rebeldes ultimamente. (The teenagers have been very rebellious lately.)
2. Ela tem um espírito rebelde e livre. (She has a rebellious and free spirit.)
3. Aquele grupo é formado por jovens rebeldes. (That group is made up of rebellious youths.)
4. Não seja rebelde com seus pais. (Don't be rebellious with your parents.)
5. Os rebeldes protestaram na rua. (The rebels protested in the street.)

Continental Portuguese Examples

1. Os jovens são muito rebeldes nesta idade. (Young people are very rebellious at this age.)
2. Houve uma revolta de rebeldes na prisão. (There was a revolt of rebels in the prison.)
3. Aqueles alunos são bastante rebeldes. (Those students are quite rebellious.)
4. Ele adotou uma postura rebelde. (He adopted a rebellious posture.)
5. É difícil lidar com pessoas tão rebeldes. (It is difficult to deal with such rebellious people.)