Vocabulary refers to the set of words an individual uses as a tool for communication. It is a collection of familiar words used or understood by an individual or group of people. There are mainly two types of vocabulary which include Productive/Active and Receptive/Passive vocabulary.Key PointProductive Vocabulary: It refers to a word which an individual:uses when he/she speaks or writes.frequently uses while writing or speaking.regularly uses to express his/her thoughts appropriately.Receptive Vocabulary: It refers to a word which an individual:recognizes when he/she hears or sees it.understands and comprehends when others use it.perceives and retrieves while listening and reading the word.Hence, we conclude that the word that we use in writing and speaking is known as productive vocabulary.