Here are some examples of English words derived from "voc":
* Vocal: relating to the voice
* Vocation: a strong feeling of being called to a particular purpose
* Advocate: a person who publicly supports or recommends a particular cause or policy
* Evoke: to bring or call forth (a feeling, memory, or image)
* Invoke: to call upon (a deity, spirit, etc.) for help or protection
* Provoke: to stimulate or incite (someone) to do or feel something, especially anger
* Revoke: to officially cancel something
* Vocabulary: the words used in a particular language or by a particular person or group
* Vociferous: expressing opinions or feelings loudly and forcefully
Let me know if you'd like to explore any specific words or examples further!