What are ancient greek words that start or have v

There aren’t any. The sound didn’t exist in ancient Greek, and there was no letter in the alphabet to represent it.

In ancient Latin, the letter ‘v’ represented the sound of English ‘w’. Certain archaic dialects of Greek had the ‘w’ sound, and wrote it with a letter known as “digamma”. But both the sound and the letter disappeared before the classical period of the language.