Occult
Witchcraft has existed since the beginning of mankind.
Ostrich!
sandcastle
One Dutch word beginning with the letter "o" is "onmiddellijk," which means "immediately" in English.
Witchcraft has existed since the beginning of humankind. It was the first form of religion.
Oasis
offence
· overjoyed
optimism
onion
originonset
Octopi