Magical abilities and skills
Though not nearly as powerful as his brother, Aberforth was nonetheless a very talented and powerful wizard in his own right, given his participation in and subsequent survival of the First and Second Wizarding Wars.
Patronus Charm: Aberforth was able to conjure a corporeal Patronus, which was very advanced magic as well as proof of superior magical ability. His Patronus took the form of a goat.
Charms: Aberforth Dumbledore once used a charm to keep a goat clean and its horns curly. Though he was prosecuted because that charm was considered inappropriate, it was still a testament of sorts to his being skilled in Charms
Dueling: During his school years, Aberforth was said to prefer to settle things by duelling instead of negotiating, which implies that, even as a student, he was already an active and experienced duellist. He even already had enough profiency and experience in martial magic at the age of 15 that he managed to hold his own in the three-way duel between himself, Albus, and Gellert Grindelwald when they were teenagers, both of whom would eventually become two of the most powerful wizards who had ever existed. During the Battle of Hogwarts, he defeated Augustus Rookwood and emerged as one of the survivors.About Me
"They were not alike; Aberforth was never bookish and, unlike Albus, preferred to settle arguments by duelling rather than through reasoned discussion. In fairness to Aberforth, it must be admitted that living in Albus's shadow cannot have been an altogether comfortable experience."