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

Yes

The meaning, spelling, and grammatical function of "comunidade" are identical in both Brazilian and Continental Portuguese. The only difference lies in pronunciation.

In Brazilian Portuguese, the unstressed "e" at the end of the word is typically pronounced as a clear "i" sound (e.g., ko-mu-ni-DA-dji), and the vowels are generally more open and rhythmic. In Continental Portuguese, the unstressed vowels are much more reduced or "swallowed," making the final "e" sound very short, almost like a whisper, or even silent (e.g., ku-mu-ni-DA-d(e)).

Brazilian Portuguese Examples

1. A comunidade do bairro é muito unida. (The neighborhood community is very united.)
2. Ele sempre ajuda a comunidade local. (He always helps the local community.)
3. Criamos uma comunidade online para gamers. (We created an online community for gamers.)
4. A comunidade escolar se reuniu hoje. (The school community met today.)
5. Precisamos fortalecer nossa comunidade. (We need to strengthen our community.)

Continental Portuguese Examples

1. A comunidade da freguesia é muito unida. (The parish community is very united.)
2. Ele ajuda sempre a comunidade local. (He always helps the local community.)
3. Criámos uma comunidade online para gamers. (We created an online community for gamers.)
4. A comunidade escolar reuniu-se hoje. (The school community met today.)
5. É preciso reforçar a nossa comunidade. (It is necessary to reinforce our community.)