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

Yes

The word "monumentos" is identical in spelling, meaning, and grammar in both Brazilian and Continental Portuguese. The only differences are phonological (pronunciation). In Brazil, the "s" at the end of the word is typically pronounced as a soft "s" (as in "sun"), whereas in Portugal, it is usually pronounced as a "sh" sound (as in "shoe"). Additionally, Brazilian Portuguese tends to have more open, melodic vowels, while Continental Portuguese features more "clipped" or reduced unstressed vowels.

Brazilian Portuguese Examples

1. Eu adoro visitar os monumentos históricos do Brasil. (I love visiting Brazil's historical monuments.)
2. Esses monumentos são muito famosos no mundo todo. (These monuments are very famous worldwide.)
3. O guia nos mostrou vários monumentos importantes. (The guide showed us several important monuments.)
4. Tem muitos monumentos bonitos aqui em São Paulo. (There are many beautiful monuments here in São Paulo.)
5. Você já viu os monumentos de Brasília? (Have you seen the monuments of Brasília?)

Continental Portuguese Examples

1. Eu adoro visitar os monumentos históricos do Brasil. (I love visiting Brazil's historical monuments.)
2. Estou a ver os monumentos de Lisboa agora. (I am looking at the monuments of Lisbon now.)
3. Os monumentos desta cidade são fantásticos. (The monuments of this city are fantastic.)
4. Gostamos de percorrer os monumentos da zona. (We like to wander through the monuments of the area.)
5. Já viste os monumentos de Évora? (Have you seen the monuments of Évora?)