lexicon
This term describes the total inventory of words available to a speaker or a language. It carries a more academic and structural tone than vocabulary, often implying a systematic organization of linguistic elements rather than just a list of known words. When referring to a physical book, it specifically denotes a dictionary that focuses on the vocabulary of a particular language or a specialized field. In professional contexts, it refers to the jargon or technical terminology unique to a specific discipline, such as the legal or medical lexicon.
Meanings
The complete set of words and vocabulary used in a particular language.
"The English lexicon has expanded significantly due to technological advancements."
The specialized vocabulary of a particular subject, profession, or social group.
"Medical students must quickly master the complex lexicon of anatomy and pathology."
A dictionary or a book containing the vocabulary of a language.
"The scholar consulted an ancient Greek lexicon to translate the manuscript."