The only thing Zeus was afraid of was being overthrown by one of his sons as he did to his father Cronus.
EDIT: He was afriad of Nyx and the Sisters of fate. The one thing he was afraid of most was Hera, his wife.
he feared nyx
Poseidon does not fear Zeus, he respects his older brother because he is the king of the gods in Greek Mythology (Zeus is Jupiter, Poseidon is Uranus in Roman mythology).
Zeus and the gods
Zeus fears of crones might rise again from the dead like in Percy Jackson and the sea of monsters!
Zeus and Posidon, his two godly brothers.
no one :)
In Greek mythology, Hades feared losing control of the Underworld, as well as experiencing betrayal from other gods or from mortals seeking to escape his domain. Additionally, Hades feared challenges to his authority and power by potential adversaries.
he feared nyx
Poseidon does not fear Zeus, he respects his older brother because he is the king of the gods in Greek Mythology (Zeus is Jupiter, Poseidon is Uranus in Roman mythology).
Zeus and the gods
In Greek mythology, Zeus did not fear any other gods or creatures. However, he was cautious of prophecies that could threaten his power and rule.
Because people thought that Zeus might throw lightning bolt at them.
Since Zeus is a god to people in some religions, it could be called a fear of religion - Theophobia.You could probably use Hellenologophobia as well - the fear of Greek terms.Finally...and most obviously...Zeusophobia. Fear of god/gods.
Poseidon was afraid of this brother Zeus. (actually, he was afraid of the sky, because Zeus ruled it.. )
Zeus fears of crones might rise again from the dead like in Percy Jackson and the sea of monsters!
Zeus and Posidon, his two godly brothers.
Hera fears that she will get a heart attack and that she will lose Zeus.