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

Yes.

The word "ensino" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. The only differences are pronunciation (vowels in Brazil tend to be more open, while in Portugal they are more closed or reduced) and collocation (the specific words "ensino" is paired with when referring to different educational levels).

Brazilian Portuguese Examples:

1. O ensino fundamental é obrigatório. (Elementary education is mandatory.)
2. Ele terminou o ensino médio no ano passado. (He finished high school last year.)
3. O ensino técnico oferece boas oportunidades. (Technical education offers good opportunities.)
4. O ensino superior exige muito estudo. (Higher education requires a lot of study.)
5. A qualidade do ensino é um tema importante. (The quality of teaching is an important topic.)

Continental Portuguese Examples:

1. O ensino básico é obrigatório. (Basic education is mandatory.)
2. Ele terminou o ensino secundário no ano passado. (He finished secondary education last year.)
3. O ensino profissional oferece boas oportunidades. (Vocational education offers good opportunities.)
4. O ensino superior exige muito estudo. (Higher education requires a lot of study.)
5. A qualidade do ensino é um tema importante. (The quality of teaching is an important topic.)