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

No

While the spelling of "nervoso" is identical in both dialects, the usage and semantic range differ. In Brazil, "nervoso" is frequently used as a synonym for being angry, mad, or upset (e.g., "Ele ficou nervoso" can mean "He got mad"). In Portugal, the word is more strictly associated with anxiety, tension, or being on edge. To express anger, a person from Portugal is much more likely to use words like zangado or irritado. Additionally, the pronunciation differs: Brazilian Portuguese features more open, melodic vowels, whereas Continental Portuguese tends to reduce or "swallow" unstressed vowels, making the word sound more clipped.

Brazilian Portuguese Examples

1. "Estou muito nervoso com a prova de amanhã." (I am very nervous about tomorrow's exam.)
2. "Não fica nervoso, foi apenas um erro." (Don't get angry, it was just a mistake.)
3. "Ele ficou muito nervoso quando viu o prejuízo." (He got very angry when he saw the loss.)
4. "O cachorro está muito nervoso hoje." (The dog is very agitated/aggressive today.)
5. "Ela é uma pessoa muito nervosa e impaciente." (She is a very anxious and impatient person.)

Continental Portuguese Examples

1. "Estou muito nervoso com o exame de amanhã." (I am very nervous about tomorrow's exam.)
2. "Não fiques zangado, foi apenas um erro." (Don't get angry, it was just a mistake.)
3. "Ele ficou muito zangado quando viu o prejuízo." (He got very angry when he saw the loss.)
4. "O cão está muito agitado hoje." (The dog is very agitated today.)
5. "Ela é uma pessoa muito ansiosa e impaciente." (She is a very anxious and impatient person.)