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

Yes

The word "cintos" (the plural of "cinto") is identical in both Brazilian and Continental Portuguese regarding its meaning, spelling, and grammar. The only difference is in pronunciation. In Brazilian Portuguese, the vowels are typically more open and clearly articulated. In Continental Portuguese, unstressed vowels (such as the final "o") are much more reduced or "closed," often sounding significantly shorter and less distinct to the listener.

Brazilian Portuguese Examples

1. Eu comprei dois cintos novos. (I bought two new belts.)
2. Guarde os seus cintos na gaveta. (Put your belts in the drawer.)
3. Esses cintos pretos combinam com tudo. (These black belts go with everything.)
4. Precisamos trocar esses cintos velhos. (We need to change these old belts.)
5. Ele tem muitos cintos de couro. (He has many leather belts.)

Continental Portuguese Examples

1. Comprei dois cintos novos. (I bought two new belts.)
2. Põe os teus cintos na gaveta. (Put your belts in the drawer.)
3. Estes cintos pretos combinam com tudo. (These black belts go with everything.)
4. Temos de trocar estes cintos velhos. (We have to change these old belts.)
5. Ele tem imensos cintos de pele. (He has many leather belts.)