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

Yes

The word "arquitetura" is identical in spelling, meaning, and grammatical function in both Brazilian and Continental Portuguese. The only differences are found in pronunciation:

• Brazilian Portuguese: The pronunciation is more "syllable-timed," meaning the vowels are more open, clear, and distinctly articulated.
• Continental Portuguese: The pronunciation is more "stress-timed," which often results in the reduction or "swallowing" of unstressed vowels, making the word sound more closed or clipped.

Brazilian Portuguese Examples:

1. A arquitetura deste prédio é muito legal. (The architecture of this building is very cool.)
2. Eu quero fazer faculdade de arquitetura. (I want to study architecture at university.)
3. Essa cidade tem uma arquitetura colonial bem bonita. (This city has very beautiful colonial architecture.)
4. O escritório de arquitetura ganhou um prêmio. (The architecture office won an award.)
5. A arquitetura moderna foca na funcionalidade. (Modern architecture focuses on functionality.)

Continental Portuguese Examples:

1. A arquitetura deste edifício é magnífica. (The architecture of this building is magnificent.)
2. Eu pretendo estudar arquitetura na universidade. (I intend to study architecture at university.)
3. Esta cidade possui uma arquitetura colonial belíssima. (This city possesses a very beautiful colonial architecture.)
4. O gabinete de arquitetura venceu um prémio. (The architecture studio won an award.)
5. A arquitetura contemporânea desafia as estruturas tradicionais. (Contemporary architecture challenges traditional structures.)