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

Yes

The word "preguiçosa" is identical in spelling, meaning, and grammatical function (adjective) in both Brazilian and Continental Portuguese. The only differences lie in pronunciation and the grammatical context in which it is typically used. In Brazil, the vowels are more open and the rhythm is more melodic, whereas in Portugal, the unstressed final "a" is much more closed or reduced. Additionally, while the word itself does not change, a Brazilian would naturally use the third-person singular (você) to address someone, while a Portuguese person would more naturally use the second-person singular (tu) in informal settings.

Brazilian Portuguese Examples

1. Ela é muito preguiçosa de manhã. (She is very lazy in the morning.)
2. Não seja preguiçosa e termine o trabalho logo. (Don't be lazy and finish the work right away.)
3. Minha gata é uma preguiçosa, só quer dormir o dia todo. (My cat is a lazy one, she just wants to sleep all day.)
4. Você é muito preguiçosa para estudar para as provas. (You are very lazy when it comes to studying for exams.)
5. Ela ficou preguiçosa depois do almoço. (She became lazy after lunch.)

Continental Portuguese Examples

1. Ela é muito preguiçosa de manhã. (She is very lazy in the morning.)
2. Não sejas preguiçosa e termina o trabalho logo. (Don't be lazy and finish the work right away.)
3. A minha gata é uma preguiçosa, só quer dormir o dia todo. (My cat is a lazy one, she just wants to sleep all day.)
4. Tu és muito preguiçosa para estudar para os exames. (You are very lazy when it comes to studying for exams.)
5. Ela ficou preguiçosa depois do almoço. (She became lazy after lunch.)