There are several animals that can defeat a lion, including:

• Elephants: Elephants are the largest land mammal and can easily defend themselves from a lion. Their size and strength make it difficult for a lion to bring them down with claws and teeth.

• Rhinos: Rhinos are another large animal that can kill a lion. They have a tough hide and a large horn that can be used to defend themselves.

• Hippos: Hippos have enormous teeth that can crush a lion with a bite. They are very strong and fast to attack a lion.

• Crocodiles: Crocodiles can harm or kill a lion when the lion comes close to their habitat, such as water bodies. Their strong teeth can crush a lion.

• Hyenas: Although one-on-one, the average lion would defeat the average hyena, hyenas often come in conflict with lions over kills. In their close-knit packs, hyenas often emerge victorious over lions, particularly spotted hyenas, which are the most aggressive species of hyena.

• Tigers: Tigers are the largest of the cat family and have a strong jaw and a bite force of over 1000 PSI. In terms of muscle strength, tigers are attacked.

• Buffalos: Buffalos are known to be very protective of their members, especially those weaker. This remarkable trait makes the buffalo a strong contender in the list of animals that can kill a lion. The only way a lion can defeat an adult buffalo is by getting a firm bite on its throat. It is very difficult for a single lion to defeat a big buffalo.

• Porcupines: Although not an aggressive animal, when provoked, porcupines will charge back to defend themselves from predators. Only inexperienced lions would attempt to attack a porcupine not knowing how dangerous it would be for them. Porcupines have a very dangerous defense mechanism that is known to kill not just lions.

Its important to note that while these animals can kill a lion, lions do not have any natural predators. Lions go after some very tough prey who fight back with all of their considerable strength and cunning. While lions do not have any natural predators, their prey will do all they can to kill a lion.