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

Yes.

The word "noivo" is identical in both Brazilian and Continental Portuguese regarding its meaning (referring to both a "fiancé" and a "groom"), its spelling, and its grammatical function. The only difference lies in pronunciation: Brazilian Portuguese tends to have more open vowels and a more melodic, syllable-timed rhythm, whereas Continental Portuguese uses more closed vowels and a more stress-timed, consonant-heavy rhythm.

Brazilian Portuguese Examples

1. O noivo da Julia é muito legal. (Julia's fiancé is very cool.)
2. Eu trouxe meu noivo para a festa. (I brought my fiancé to the party.)
3. O noivo ficou muito emocionado durante os votos. (The groom became very emotional during the vows.)
4. O noivo e a noiva chegaram agora. (The groom and the bride arrived just now.)
5. Você já conheceu meu noivo? (Have you met my fiancé yet?)

Continental Portuguese Examples

1. O noivo da Júlia é muito porreiro. (Julia's fiancé is very cool.)
2. Apresentei o meu noivo à minha família. (I introduced my fiancé to my family.)
3. O noivo emocionou-se bastante durante os votos. (The groom became quite emotional during the vows.)
4. O noivo e a noiva chegaram agora mesmo. (The groom and the bride arrived just now.)
5. Já conheceste o meu noivo? (Have you met my fiancé?)