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

No

The word "deixamos" has significant differences in orthography, grammar, and pronunciation between Brazilian and Continental Portuguese:

• Orthography (Spelling): In Brazil, the present tense and the past tense (preterite) are spelled identically: deixamos. In Portugal, the accent is used in the past tense (deixámos) to distinguish it from the present tense (deixamos).
• Grammar (Syntax): There is a major difference in how object pronouns are used with this verb. In Brazil, it is natural and common to use the direct object pronoun as if it were a subject (e.g., "deixamos ele"). In Portugal, this is grammatically incorrect; they use enclisis (e.g., "deixámo-lo").
• Pronunciation: In Portugal, the "s" at the end of the word is typically pronounced as a "sh" sound ([ʃ]), and the vowels are more closed or reduced. In much of Brazil, the "s" is pronounced as [s] or [ʃ] depending on the region, and the vowels are generally more open and clear.

Brazilian Portuguese Examples:

1. Nós deixamos o celular na mesa. (We left the cell phone on the table.)
2. Nós deixamos ele entrar na sala. (We let him enter the room.)
3. Nós deixamos de comer doce. (We stopped eating sweets.)
4. Nós deixamos a porta aberta. (We left the door open.)
5. Nós deixamos as compras no carro. (We left the groceries in the car.)

Continental Portuguese Examples:

1. Nós deixámos o telemóvel na mesa. (We left the mobile phone on the table.)
2. Nós deixámo-lo entrar na sala. (We let him enter the room.)
3. Nós deixámos de comer doces. (We stopped eating sweets.)
4. Nós deixámos a porta aberta. (We left the door open.)
5. Nós deixámos as compras no carro. (We left the groceries in the car.)