A lexicographer is a person who writes, edits, or compiles dictionaries by researching words, meanings, spellings, usage, and history. In poetry and literary discussion, the word often appears when a poet refers to someone who studies language closely or treats words as objects of craft and authority.
The term is often linked with Samuel Johnson, who famously called a lexicographer "a harmless drudge."
Example
She worked like a lexicographer at dusk,
weighing each word before it entered the poem,
choosing between rain, shower, and storm.
[n] a compiler or writer of a dictionary; a student of the lexical component of language