Final answer:
Pablo Escobar was commonly known as a drug lord, which is the correct four-letter word to describe his tenure in narcotics trade, making 'lord' the answer to the question.
Step-by-step explanation:
If Pablo Escobar had a website, it would likely refer to his tenure as a drug lord, which is a description commonly used in historical accounts to describe his role in the narcotics trade. The four-letter word that fits the description in the context of Escobar's activities is 'lord', making option c) Lord the correct answer.