The fear of missing out is the fear of missing out on something that's more fun, exciting, or better than what you're already doing. This particular fear has no designated scientific name, but it is often referred to as 'FOMO' phobia.
There is no official phobia name for the fear of vipers. However the official phobia name for the fear of snakes is ophidiophobia.
The phobia name for the fear of monkeys is Cynophobia.
The phobia name for the fear of the unknown is called Xenophobia.
Mnemophobia is the name of the phobia related to the fear of memories
Carnophobia is the name of the phobia related to the fear of meat
Hylephobia is the name of the phobia related to the fear of materialism
Gamophobia is the name of the phobia related to the fear of marriage
Mechanophobia is the name of the phobia related to the fear of machines
Melophobia is the name of the phobia related to the fear of music.
Selenophobia is the name of the phobia relating to the fear of the moon
Ballistophobia is the name of the phobia related to the fear of missiles
Eisoptrophobia is the name of the phobia related to the fear of mirrors.