Directly from "logos":
* Logo: A graphic symbol used to represent a company or organization.
* Logotype: A name or brand name designed with a specific typeface and style.
* Logorrhea: Excessive and often incoherent talkativeness.
* Logophile: A lover of words.
Using "logos" as a prefix:
* Logocentric: Centered on the word or language.
* Logogram: A single symbol representing a word or phrase.
* Logomania: An obsession with words or brands.
* Logorrhea: Excessive and often incoherent talkativeness.
* Logograph: A writer of logos, especially a person who draws or designs logos.
Using "logos" as a suffix:
* Astrologos: A practitioner of astrology.
* Biologos: The study of living organisms.
* Chronologos: A person who studies or deals with chronology.
* Cosmologos: A person who studies cosmology.
* Ethnologos: A person who studies ethnology.
* Geologos: A person who studies geology.
* Mythologos: A person who studies mythology.
* Psychologos: A person who studies psychology.
* Theologos: A person who studies theology.
Other related words:
* Dialogue: Conversation between two or more people.
* Epilogue: A concluding section or speech.
* Prologue: An introductory section or speech.
* Monologue: A long speech by one person.
This list is not exhaustive, but it provides a good starting point for exploring words with the root "logo."