Paraphrases are extremely important in human communication, both in production and understanding of natural language, and play an increasingly important role in research activities and projects and in a wide variety of software applications, as they allow for recognising and generating equivalent ways of expressing the same content. That is, paraphrases allow systems to provide the user with suggestions for saying and writing the same thing / idea in other words. They also help increase fluency, creativity and stylistic diversity in language usage. Increasingly, more research is needed in order to create paraphrasing systems that can be useful in the areas of text production and proofreading, and in the development and enhancement of online authoring platforms, developing interactive programs to help Portuguese language learners to produce different but equivalent phrases.