vocabulary

1 the special terms or expressions of a particular group or field <scientific vocabulary> Synonyms argot, cant, dialect, jargon, jive, language, lingo, patois, patter, shop, shoptalk, slang, terminologyRelated Words colloquial, colloquialism, idiom, localism, parlance, pidgin, provincialism, regionalism, speech, vernacular, vernacularism; slanguage; bureaucratese, computerese, cyberspeak, educationese, governmentese, journalese, technobabble

2 the stock of words, pronunciation, and grammar used by a people as their basic means of communication <children learn enough of the common vocabulary to make themselves understood by around the age of two> Synonyms lingo, mother tongue, speech, tongue, languageRelated Words acrolect; argot, cant, colloquial, dialect, idiolect, idiom, jargon, parlance, patois, patter, pidgin, slang, slanguage, vernacular; colloquialism, localism, provincialism, regionalism, shibboleth, vernacularism; terminology; coinage, modernism, neologism