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

Yes

The word "descoberta" is identical in meaning, spelling, and grammatical function in both Brazilian and Continental Portuguese. The only differences are phonetic. In Brazilian Portuguese, the vowels are generally more open and clearly articulated. In Continental Portuguese, unstressed vowels tend to be more "reduced" or shortened, which can make the word sound more clipped or closed to a Brazilian ear.

Brazilian Portuguese Examples

1. A descoberta da América mudou a história do mundo. (The discovery of America changed the history of the world.)
2. Ele fez uma descoberta incrível no meio da floresta. (He made an incredible discovery in the middle of the forest.)
3. A descoberta de um novo remédio é muito importante. (The discovery of a new medicine is very important.)
4. Essa descoberta científica vai revolucionar a tecnologia. (This scientific discovery is going to revolutionize technology.)
5. Foi uma descoberta acidental durante a pesquisa. (It was an accidental discovery during the research.)

Continental Portuguese Examples

Note: In these examples, the word "descoberta" remains the same as it is the natural term in Portugal, though the phrasing and vocabulary choices reflect a more common European Portuguese style.

1. A descoberta da América alterou a história do mundo. (The discovery of America altered the history of the world.)
2. Ele fez uma descoberta fantástica no meio da floresta. (He made a fantastic discovery in the middle of the forest.)
3. A descoberta de um novo fármaco é muito importante. (The discovery of a new drug is very important.)
4. Esta descoberta científica irá revolucionar a tecnologia. (This scientific discovery will revolutionize technology.)
5. Foi uma descoberta acidental durante a investigação. (It was an accidental discovery during the investigation.)