Which term refers to all the words in our language necessary for effective communication?

The term that refers to all the words in our language necessary for effective communication is vocabulary. Vocabulary encompasses the set of words known and used by an individual or a group, playing a vital role in understanding and conveying meaning in spoken and written language. It is the foundation for language proficiency, enabling effective communication by providing the necessary tools to express thoughts, ideas, and emotions clearly.

Lexicon, while closely related, typically refers to the complete set of words within a specific language, including their meanings, forms, and functions, but not necessarily the words that an individual uses for effective communication. Terminology is more specialized, focusing on words and phrases used in specific fields or subjects and is not synonymous with overall vocabulary for communication. A dictionary is a reference book or online resource that contains a list of words and their definitions, but it does not, on its own, encompass all the words necessary for effective communication.

Thus, vocabulary is the most comprehensive and applicable term in the context of effective communication.