* Brazilianness: This captures the essence of being Brazilian, including its culture, history, and identity.
* Brazilianity: Similar to Brazilianness, this emphasizes the distinctiveness of Brazil.
* Brazilian spirit: This focuses on the character and spirit of the Brazilian people.
You could also use more specific abstract nouns based on the specific aspect of Brazil you are referring to:
* Carnival: For the famous festival
* Soccer: For the national sport
* Amazonia: For the vast rainforest
* Tropicality: For the climate and landscape
Ultimately, the best abstract noun will depend on the specific meaning you want to convey.