vocabulary
/voʊˈkæbjəˌleri/ /Brit vəʊˈkæbjələri/
noun
plural -laries
[count] :the words that make up a language
all of the words known and used by a person [noncount]
[count, noncount] :words that are related to a particular subject
[count, noncount] :a set of forms or elements that are used for expression in an art, in music, etc.