When it comes to describing something as potent and powerful, "strong as brandy" is a common phrase used. However, there are several synonyms that can be used to convey the same message. "Robust," "vibrant," and "vigorous" are excellent alternatives that highlight a sense of vitality and strength. "Potent," "intense," and "potent" are other words that suggest a high level of concentration and impact. "Tough," "resilient," and "sturdy" are also suitable terms that emphasize durability and endurance. Whatever synonym is chosen, the point is clear: the subject in question possesses an impressive amount of strength and force.