You searched for: “lexiconophilist
lexiconophilist (s) (noun), lexiconophilists (pl)
A person who collects dictionaries and related books about words because he or she has a fondness for vocabulary: The author of this extensive dictionary had a library full of different lexica, encyclopaedias, glossaries, and word lists for doing his research, and so he was certainly a lexiconophilist!