To describe something as lexical is to say that it is related to words or vocabulary.

// A dictionary provides lexical information—it tells you what the word "cat" means, not all there is to know about cats.

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"From his [artist Jean-Michel Basquiat's] lyrical brushstrokes to his lexical compositions, music is imbued even when the reference is subtle or ambiguous. There are obvious portraits of jazz greats and song titles in many works, while others force a more discerning gaze." — Natasha Gural, Forbes, 24 Jan. 2023

The word lexical and its relatives have a special place in our hearts (and in our dictionaries). In addition to referring to one's personal vocabulary, lexicon can be used as a synonym of dictionary, and the word lexicography refers to the practice of making dictionaries. Both of these words, as well as lexical, come from the Greek word lexis, meaning "word" or "speech." So, if you’re considering a lexical—that is, word-related—career as a wordsmith or, say, a lexicographer, you may want to add these terms to your lexicon.