Receptive vs. Productive Vocabulary : Vocabulary.com
In Vocabulary at the Core , Amy Benjamin and John T. Crow assert that word study should play a more significant role in English class and across the curriculum — as emphasized by the Common Core State Standards.
An important distinction exists, therefore, concerning the words that you have locked in your brain. To capture this distinction, we use the terms receptive and productive:
You are in receptive control of the words that you understand when you hear them or read them.You are in productive control of the words that you use to express yourself, in speech or in writing.
Via Mel Riddile