In Brazillian portuguese, the only words ended with "n" are scientific names (neologisms?) with a latin radical, e.g. elétron, próton, nêutron, pólen, plâncton,

In Brazillian portuguese, the only words ended with "n" are scientific names (neologisms?) with a latin radical, e.g. elétron, próton, nêutron, pólen, plâncton, necton, etc. In European portuguese, while the above forms are also common, the alternatives "electrão, protão, neutrão" are often found.