What are false friends?
False friends are words which have similar writing, or even identical in both distinct languages, but their meanings are different.
Take as an example the word exquisite. In portuguese it would easily be misunderstood as exquisito(weird), when it really means requintado, refinado.
The most appropriate denomination of false friends in portuguese would be 'cognatos de sentido diferente'. Cognates are words which contain the same root as another language, but as languages developed apart their meanings may differ.
Here are some of them:
actual verdadeiro, real
cobra Naja(uma especie de cobra)
eventually finalmente, no final, por fim
There is a pocketbook you can buy to get you started:
Easy Way False Friends by José Roberto A. Igreja
Alliance for a Healthier Generation: Combating Childhood Obesity by creating Healthy Schools, empowering youth leaders, healthcare, healthier school food and beverages