lexicon
nounUK /ˈleksɪkən/
US /ˈleksɪkɑːn/
A lexicon is all the words that a person or a language knows.
Learning new words every day helps build your lexicon.
RELATED WORDS
OTHER MEANINGS
2. A dictionary, especially one for an ancient language.
The scholar studied a Greek lexicon to translate the old text.
3. The special words used in a particular subject or job.
Scientists have their own lexicon full of technical terms.
4. The full set of words in a language.
English has a huge lexicon with words from many countries.